revert global_env usage for build_interop_image
revert global_env usage for build_interop_image

wcevans/grpc,leifurhauks/grpc,thunderboltsid/grpc,infinit/grpc,soltanmm-google/grpc,yang-g/grpc,msiedlarek/grpc,donnadionne/grpc,murgatroid99/grpc,perumaalgoog/grpc,stanley-cheung/grpc,fuchsia-mirror/third_party-grpc,geffzhang/grpc,ppietrasa/grpc,goldenbull/grpc,msiedlarek/grpc,miselin/grpc,greasypizza/grpc,kumaralokgithub/grpc,ppietrasa/grpc,perumaalgoog/grpc,simonkuang/grpc,carl-mastrangelo/grpc,thunderboltsid/grpc,andrewpollock/grpc,kpayson64/grpc,a11r/grpc,LuminateWireless/grpc,grpc/grpc,malexzx/grpc,firebase/grpc,pszemus/grpc,apolcyn/grpc,hstefan/grpc,rjshade/grpc,makdharma/grpc,soltanmm-google/grpc,chrisdunelm/grpc,ananthonline/grpc,thunderboltsid/grpc,wcevans/grpc,yongni/grpc,vjpai/grpc,firebase/grpc,philcleveland/grpc,Vizerai/grpc,murgatroid99/grpc,baylabs/grpc,tengyifei/grpc,ananthonline/grpc,nicolasnoble/grpc,firebase/grpc,goldenbull/grpc,maxwell-demon/grpc,a11r/grpc,ananthonline/grpc,ejona86/grpc,makdharma/grpc,zhimingxie/grpc,a-veitch/grpc,kpayson64/grpc,PeterFaiman/ruby-grpc-minimal,mehrdada/grpc,vsco/grpc,jcanizales/grpc,ppietrasa/grpc,makdharma/grpc,stanley-cheung/grpc,mehrdada/grpc,rjshade/grpc,vsco/grpc,dgquintas/grpc,Vizerai/grpc,miselin/grpc,adelez/grpc,y-zeng/grpc,w4-sjcho/grpc,jtattermusch/grpc,grpc/grpc,7anner/grpc,thinkerou/grpc,maxwell-demon/grpc,adelez/grpc,firebase/grpc,thinkerou/grpc,carl-mastrangelo/grpc,msiedlarek/grpc,ctiller/grpc,firebase/grpc,leifurhauks/grpc,hstefan/grpc,donnadionne/grpc,nicolasnoble/grpc,a-veitch/grpc,geffzhang/grpc,jtattermusch/grpc,hstefan/grpc,Vizerai/grpc,nicolasnoble/grpc,deepaklukose/grpc,thunderboltsid/grpc,yugui/grpc,muxi/grpc,yongni/grpc,ipylypiv/grpc,kumaralokgithub/grpc,jtattermusch/grpc,ncteisen/grpc,ipylypiv/grpc,kriswuollett/grpc,soltanmm/grpc,malexzx/grpc,carl-mastrangelo/grpc,arkmaxim/grpc,firebase/grpc,madongfly/grpc,podsvirov/grpc,ctiller/grpc,jcanizales/grpc,y-zeng/grpc,y-zeng/grpc,Vizerai/grpc,geffzhang/grpc,MakMukhi/grpc,a11r/grpc,vjpai/grpc,stanley-cheung/grpc,deepaklukose/grpc,yang-g/grpc,sreecha/grpc,arkmaxim/grpc,chrisdunelm/grpc,soltanmm-google/grpc,yugui/grpc,Vizerai/grpc,ctiller/grpc,goldenbull/grpc,soltanmm/grpc,apolcyn/grpc,wcevans/grpc,sreecha/grpc,daniel-j-born/grpc,kumaralokgithub/grpc,dgquintas/grpc,infinit/grpc,grpc/grpc,firebase/grpc,maxwell-demon/grpc,baylabs/grpc,soltanmm/grpc,jboeuf/grpc,tengyifei/grpc,geffzhang/grpc,greasypizza/grpc,nicolasnoble/grpc,kumaralokgithub/grpc,dklempner/grpc,bogdandrutu/grpc,grani/grpc,geffzhang/grpc,simonkuang/grpc,a-veitch/grpc,7anner/grpc,miselin/grpc,carl-mastrangelo/grpc,goldenbull/grpc,maxwell-demon/grpc,vjpai/grpc,arkmaxim/grpc,kpayson64/grpc,dgquintas/grpc,madongfly/grpc,vsco/grpc,vjpai/grpc,royalharsh/grpc,perumaalgoog/grpc,jtattermusch/grpc,ppietrasa/grpc,firebase/grpc,ejona86/grpc,ctiller/grpc,simonkuang/grpc,yang-g/grpc,a-veitch/grpc,ctiller/grpc,thinkerou/grpc,pszemus/grpc,LuminateWireless/grpc,thinkerou/grpc,maxwell-demon/grpc,muxi/grpc,jboeuf/grpc,chrisdunelm/grpc,madongfly/grpc,ipylypiv/grpc,grpc/grpc,arkmaxim/grpc,malexzx/grpc,msmania/grpc,rjshade/grpc,carl-mastrangelo/grpc,ananthonline/grpc,fuchsia-mirror/third_party-grpc,bogdandrutu/grpc,sreecha/grpc,chrisdunelm/grpc,tamihiro/grpc,tamihiro/grpc,vjpai/grpc,dgquintas/grpc,hstefan/grpc,Vizerai/grpc,makdharma/grpc,adelez/grpc,MakMukhi/grpc,makdharma/grpc,ejona86/grpc,geffzhang/grpc,carl-mastrangelo/grpc,pszemus/grpc,adelez/grpc,thinkerou/grpc,yugui/grpc,VcamX/grpc,LuminateWireless/grpc,a-veitch/grpc,simonkuang/grpc,baylabs/grpc,Crevil/grpc,bogdandrutu/grpc,kriswuollett/grpc,ipylypiv/grpc,stanley-cheung/grpc,w4-sjcho/grpc,sreecha/grpc,muxi/grpc,nicolasnoble/grpc,sreecha/grpc,andrewpollock/grpc,kumaralokgithub/grpc,pszemus/grpc,ncteisen/grpc,quizlet/grpc,carl-mastrangelo/grpc,infinit/grpc,deepaklukose/grpc,grani/grpc,VcamX/grpc,pmarks-net/grpc,PeterFaiman/ruby-grpc-minimal,nicolasnoble/grpc,dgquintas/grpc,chrisdunelm/grpc,w4-sjcho/grpc,tamihiro/grpc,yongni/grpc,tamihiro/grpc,hstefan/grpc,muxi/grpc,msiedlarek/grpc,firebase/grpc,yongni/grpc,VcamX/grpc,pszemus/grpc,daniel-j-born/grpc,MakMukhi/grpc,Crevil/grpc,Crevil/grpc,infinit/grpc,yongni/grpc,dgquintas/grpc,wcevans/grpc,a-veitch/grpc,sreecha/grpc,deepaklukose/grpc,PeterFaiman/ruby-grpc-minimal,infinit/grpc,hstefan/grpc,murgatroid99/grpc,Crevil/grpc,fuchsia-mirror/third_party-grpc,vsco/grpc,tamihiro/grpc,a11r/grpc,hstefan/grpc,yugui/grpc,PeterFaiman/ruby-grpc-minimal,rjshade/grpc,soltanmm-google/grpc,perumaalgoog/grpc,ejona86/grpc,muxi/grpc,goldenbull/grpc,carl-mastrangelo/grpc,hstefan/grpc,ncteisen/grpc,muxi/grpc,philcleveland/grpc,mehrdada/grpc,vjpai/grpc,thunderboltsid/grpc,philcleveland/grpc,yongni/grpc,sreecha/grpc,firebase/grpc,podsvirov/grpc,goldenbull/grpc,y-zeng/grpc,mehrdada/grpc,maxwell-demon/grpc,leifurhauks/grpc,jcanizales/grpc,Vizerai/grpc,a11r/grpc,ppietrasa/grpc,kpayson64/grpc,royalharsh/grpc,sreecha/grpc,podsvirov/grpc,y-zeng/grpc,a11r/grpc,dgquintas/grpc,mehrdada/grpc,kumaralokgithub/grpc,tamihiro/grpc,infinit/grpc,adelez/grpc,fuchsia-mirror/third_party-grpc,fuchsia-mirror/third_party-grpc,infinit/grpc,jtattermusch/grpc,sreecha/grpc,makdharma/grpc,dgquintas/grpc,donnadionne/grpc,jboeuf/grpc,leifurhauks/grpc,madongfly/grpc,soltanmm/grpc,7anner/grpc,zhimingxie/grpc,deepaklukose/grpc,arkmaxim/grpc,jboeuf/grpc,apolcyn/grpc,pszemus/grpc,PeterFaiman/ruby-grpc-minimal,malexzx/grpc,ananthonline/grpc,daniel-j-born/grpc,msiedlarek/grpc,malexzx/grpc,yang-g/grpc,pmarks-net/grpc,kpayson64/grpc,a-veitch/grpc,philcleveland/grpc,andrewpollock/grpc,wcevans/grpc,carl-mastrangelo/grpc,pszemus/grpc,muxi/grpc,greasypizza/grpc,kpayson64/grpc,jtattermusch/grpc,kriswuollett/grpc,zhimingxie/grpc,muxi/grpc,simonkuang/grpc,quizlet/grpc,geffzhang/grpc,Vizerai/grpc,royalharsh/grpc,royalharsh/grpc,MakMukhi/grpc,stanley-cheung/grpc,stanley-cheung/grpc,quizlet/grpc,deepaklukose/grpc,sreecha/grpc,greasypizza/grpc,murgatroid99/grpc,quizlet/grpc,apolcyn/grpc,thinkerou/grpc,yang-g/grpc,thunderboltsid/grpc,kpayson64/grpc,maxwell-demon/grpc,kskalski/grpc,pmarks-net/grpc,baylabs/grpc,yang-g/grpc,msmania/grpc,y-zeng/grpc,LuminateWireless/grpc,Crevil/grpc,matt-kwong/grpc,ctiller/grpc,a11r/grpc,dklempner/grpc,LuminateWireless/grpc,arkmaxim/grpc,ncteisen/grpc,pmarks-net/grpc,kskalski/grpc,LuminateWireless/grpc,LuminateWireless/grpc,perumaalgoog/grpc,jboeuf/grpc,ejona86/grpc,ppietrasa/grpc,daniel-j-born/grpc,baylabs/grpc,royalharsh/grpc,andrewpollock/grpc,matt-kwong/grpc,arkmaxim/grpc,jcanizales/grpc,wcevans/grpc,donnadionne/grpc,leifurhauks/grpc,perumaalgoog/grpc,murgatroid99/grpc,soltanmm/grpc,kskalski/grpc,quizlet/grpc,tengyifei/grpc,murgatroid99/grpc,thinkerou/grpc,bogdandrutu/grpc,adelez/grpc,kriswuollett/grpc,madongfly/grpc,grani/grpc,goldenbull/grpc,chrisdunelm/grpc,soltanmm/grpc,jboeuf/grpc,muxi/grpc,grpc/grpc,a-veitch/grpc,murgatroid99/grpc,malexzx/grpc,wcevans/grpc,stanley-cheung/grpc,vsco/grpc,donnadionne/grpc,grpc/grpc,wcevans/grpc,andrewpollock/grpc,stanley-cheung/grpc,yongni/grpc,MakMukhi/grpc,podsvirov/grpc,kpayson64/grpc,ipylypiv/grpc,7anner/grpc,greasypizza/grpc,pmarks-net/grpc,jboeuf/grpc,yongni/grpc,vjpai/grpc,mehrdada/grpc,msiedlarek/grpc,andrewpollock/grpc,greasypizza/grpc,ncteisen/grpc,fuchsia-mirror/third_party-grpc,matt-kwong/grpc,PeterFaiman/ruby-grpc-minimal,7anner/grpc,ncteisen/grpc,adelez/grpc,dklempner/grpc,hstefan/grpc,deepaklukose/grpc,Vizerai/grpc,adelez/grpc,fuchsia-mirror/third_party-grpc,carl-mastrangelo/grpc,tengyifei/grpc,a11r/grpc,miselin/grpc,tengyifei/grpc,thunderboltsid/grpc,ncteisen/grpc,apolcyn/grpc,miselin/grpc,vjpai/grpc,stanley-cheung/grpc,yang-g/grpc,tamihiro/grpc,ipylypiv/grpc,pszemus/grpc,pmarks-net/grpc,firebase/grpc,nicolasnoble/grpc,simonkuang/grpc,ejona86/grpc,philcleveland/grpc,deepaklukose/grpc,vjpai/grpc,kriswuollett/grpc,greasypizza/grpc,ananthonline/grpc,Crevil/grpc,mehrdada/grpc,philcleveland/grpc,fuchsia-mirror/third_party-grpc,infinit/grpc,dklempner/grpc,daniel-j-born/grpc,carl-mastrangelo/grpc,msiedlarek/grpc,PeterFaiman/ruby-grpc-minimal,7anner/grpc,Vizerai/grpc,madongfly/grpc,zhimingxie/grpc,rjshade/grpc,philcleveland/grpc,Vizerai/grpc,grpc/grpc,tengyifei/grpc,philcleveland/grpc,donnadionne/grpc,dgquintas/grpc,Crevil/grpc,zhimingxie/grpc,donnadionne/grpc,mehrdada/grpc,jtattermusch/grpc,ppietrasa/grpc,matt-kwong/grpc,rjshade/grpc,jtattermusch/grpc,royalharsh/grpc,pszemus/grpc,stanley-cheung/grpc,ctiller/grpc,chrisdunelm/grpc,rjshade/grpc,zhimingxie/grpc,ipylypiv/grpc,perumaalgoog/grpc,MakMukhi/grpc,carl-mastrangelo/grpc,deepaklukose/grpc,grpc/grpc,grpc/grpc,bogdandrutu/grpc,dklempner/grpc,goldenbull/grpc,baylabs/grpc,yugui/grpc,simonkuang/grpc,Crevil/grpc,kpayson64/grpc,matt-kwong/grpc,vjpai/grpc,y-zeng/grpc,soltanmm-google/grpc,sreecha/grpc,ppietrasa/grpc,zhimingxie/grpc,malexzx/grpc,yongni/grpc,firebase/grpc,baylabs/grpc,matt-kwong/grpc,nicolasnoble/grpc,quizlet/grpc,thinkerou/grpc,a11r/grpc,perumaalgoog/grpc,soltanmm-google/grpc,nicolasnoble/grpc,malexzx/grpc,daniel-j-born/grpc,PeterFaiman/ruby-grpc-minimal,matt-kwong/grpc,yang-g/grpc,muxi/grpc,apolcyn/grpc,kskalski/grpc,tengyifei/grpc,pszemus/grpc,maxwell-demon/grpc,maxwell-demon/grpc,VcamX/grpc,tengyifei/grpc,thinkerou/grpc,VcamX/grpc,soltanmm/grpc,bogdandrutu/grpc,stanley-cheung/grpc,podsvirov/grpc,ctiller/grpc,kriswuollett/grpc,leifurhauks/grpc,msmania/grpc,kskalski/grpc,podsvirov/grpc,thinkerou/grpc,yang-g/grpc,royalharsh/grpc,mehrdada/grpc,philcleveland/grpc,VcamX/grpc,MakMukhi/grpc,pmarks-net/grpc,murgatroid99/grpc,apolcyn/grpc,grani/grpc,madongfly/grpc,msiedlarek/grpc,donnadionne/grpc,kskalski/grpc,kriswuollett/grpc,MakMukhi/grpc,w4-sjcho/grpc,jcanizales/grpc,msmania/grpc,wcevans/grpc,bogdandrutu/grpc,w4-sjcho/grpc,makdharma/grpc,msmania/grpc,miselin/grpc,ejona86/grpc,daniel-j-born/grpc,ncteisen/grpc,tengyifei/grpc,kpayson64/grpc,baylabs/grpc,malexzx/grpc,msmania/grpc,geffzhang/grpc,ejona86/grpc,vsco/grpc,miselin/grpc,andrewpollock/grpc,msmania/grpc,kskalski/grpc,murgatroid99/grpc,jcanizales/grpc,podsvirov/grpc,7anner/grpc,vsco/grpc,msmania/grpc,mehrdada/grpc,vsco/grpc,quizlet/grpc,yugui/grpc,jtattermusch/grpc,ctiller/grpc,7anner/grpc,dklempner/grpc,dklempner/grpc,msmania/grpc,jcanizales/grpc,ejona86/grpc,royalharsh/grpc,zhimingxie/grpc,mehrdada/grpc,dklempner/grpc,simonkuang/grpc,vjpai/grpc,jboeuf/grpc,LuminateWireless/grpc,goldenbull/grpc,rjshade/grpc,w4-sjcho/grpc,jtattermusch/grpc,PeterFaiman/ruby-grpc-minimal,royalharsh/grpc,jboeuf/grpc,chrisdunelm/grpc,kpayson64/grpc,tamihiro/grpc,quizlet/grpc,bogdandrutu/grpc,y-zeng/grpc,kumaralokgithub/grpc,makdharma/grpc,grpc/grpc,ipylypiv/grpc,grani/grpc,dklempner/grpc,vsco/grpc,apolcyn/grpc,soltanmm-google/grpc,fuchsia-mirror/third_party-grpc,w4-sjcho/grpc,jboeuf/grpc,w4-sjcho/grpc,VcamX/grpc,murgatroid99/grpc,podsvirov/grpc,grani/grpc,ncteisen/grpc,thunderboltsid/grpc,chrisdunelm/grpc,LuminateWireless/grpc,MakMukhi/grpc,w4-sjcho/grpc,miselin/grpc,VcamX/grpc,thunderboltsid/grpc,grpc/grpc,miselin/grpc,muxi/grpc,kriswuollett/grpc,grpc/grpc,y-zeng/grpc,greasypizza/grpc,pszemus/grpc,donnadionne/grpc,muxi/grpc,grani/grpc,grani/grpc,daniel-j-born/grpc,jboeuf/grpc,arkmaxim/grpc,thinkerou/grpc,a-veitch/grpc,perumaalgoog/grpc,matt-kwong/grpc,jcanizales/grpc,soltanmm/grpc,yugui/grpc,ananthonline/grpc,pmarks-net/grpc,yugui/grpc,mehrdada/grpc,kskalski/grpc,ejona86/grpc,kskalski/grpc,ncteisen/grpc,matt-kwong/grpc,quizlet/grpc,adelez/grpc,chrisdunelm/grpc,soltanmm/grpc,ctiller/grpc,madongfly/grpc,zhimingxie/grpc,nicolasnoble/grpc,ejona86/grpc,donnadionne/grpc,dgquintas/grpc,simonkuang/grpc,jcanizales/grpc,soltanmm-google/grpc,grani/grpc,jboeuf/grpc,ncteisen/grpc,thinkerou/grpc,leifurhauks/grpc,nicolasnoble/grpc,kumaralokgithub/grpc,ananthonline/grpc,geffzhang/grpc,ppietrasa/grpc,ctiller/grpc,jtattermusch/grpc,apolcyn/grpc,ncteisen/grpc,daniel-j-born/grpc,chrisdunelm/grpc,leifurhauks/grpc,soltanmm-google/grpc,tamihiro/grpc,ananthonline/grpc,nicolasnoble/grpc,kumaralokgithub/grpc,makdharma/grpc,madongfly/grpc,baylabs/grpc,pszemus/grpc,VcamX/grpc,vjpai/grpc,msiedlarek/grpc,podsvirov/grpc,stanley-cheung/grpc,arkmaxim/grpc,sreecha/grpc,donnadionne/grpc,ejona86/grpc,Crevil/grpc,ipylypiv/grpc,pmarks-net/grpc,7anner/grpc,leifurhauks/grpc,ctiller/grpc,donnadionne/grpc,andrewpollock/grpc,andrewpollock/grpc,rjshade/grpc,dgquintas/grpc,yugui/grpc,infinit/grpc,jtattermusch/grpc,PeterFaiman/ruby-grpc-minimal,greasypizza/grpc,kriswuollett/grpc,fuchsia-mirror/third_party-grpc,bogdandrutu/grpc