Add test for disabled EphemeralContainers feature
Add test for disabled EphemeralContainers feature

This adds an integration test to validate expected behavior when the
EphemeralContainers feature gate is disabled.

xlgao-zju/kubernetes,kpgriffith/kubernetes,ravilr/kubernetes,dlorenc/kubernetes,iameli/kubernetes,PiotrProkop/kubernetes,alejandroEsc/kubernetes,chrislovecnm/kubernetes,olivierlemasle/kubernetes,joelsmith/kubernetes,chestack/kubernetes,krmayankk/kubernetes,zhangmingld/kubernetes,olivierlemasle/kubernetes,kitt1987/kubernetes,rafax/kubernetes,zhangmingld/kubernetes,Clarifai/kubernetes,rnaveiras/kubernetes,ii/kubernetes,brendandburns/kubernetes,Clarifai/kubernetes,GulajavaMinistudio/kubernetes,fabriziopandini/kubernetes,mahak/kubernetes,kitt1987/kubernetes,kitt1987/kubernetes,andrewrynhard/kubernetes,mikedanese/kubernetes,PiotrProkop/kubernetes,monopole/kubernetes,jsafrane/kubernetes,coolsvap/kubernetes,dixudx/kubernetes,mfojtik/kubernetes,chrislovecnm/kubernetes,humblec/kubernetes,jackfrancis/kubernetes,micahhausler/kubernetes,xlgao-zju/kubernetes,zhouhaibing089/kubernetes,weiwei04/kubernetes,weiwei04/kubernetes,fanzhangio/kubernetes,mengqiy/kubernetes,iameli/kubernetes,feiskyer/kubernetes,Acidburn0zzz/kubernetes,rrati/kubernetes,rafax/kubernetes,mahak/kubernetes,shyamjvs/kubernetes,joelsmith/kubernetes,krmayankk/kubernetes,jackfrancis/kubernetes,mengqiy/kubernetes,kevin-wangzefeng/kubernetes,jagosan/kubernetes,gnufied/kubernetes,brendandburns/kubernetes,deads2k/kubernetes,ingvagabund/kubernetes,wongma7/kubernetes,openshift/kubernetes,csrwng/kubernetes,jsafrane/kubernetes,enj/kubernetes,PI-Victor/kubernetes,humblec/kubernetes,olivierlemasle/kubernetes,ingvagabund/kubernetes,ii/kubernetes,warmchang/kubernetes,BenTheElder/kubernetes,wongma7/kubernetes,csrwng/kubernetes,dlorenc/kubernetes,jagosan/kubernetes,mengqiy/kubernetes,spzala/kubernetes,mahak/kubernetes,verult/kubernetes,wongma7/kubernetes,BenTheElder/kubernetes,jingxu97/kubernetes,kubernetes/kubernetes,dixudx/kubernetes,xychu/kubernetes,nak3/kubernetes,kevin-wangzefeng/kubernetes,enj/kubernetes,hex108/kubernetes,liggitt/kubernetes,krmayankk/kubernetes,brendandburns/kubernetes,rnaveiras/kubernetes,BenTheElder/kubernetes,saad-ali/kubernetes,jessfraz/kubernetes,PiotrProkop/kubernetes,PI-Victor/kubernetes,Acidburn0zzz/kubernetes,chrislovecnm/kubernetes,sdminonne/kubernetes,coolsvap/kubernetes,joelsmith/kubernetes,nckturner/kubernetes,fanzhangio/kubernetes,verb/kubernetes,BenTheElder/kubernetes,cblecker/kubernetes,dixudx/kubernetes,carlory/kubernetes,hex108/kubernetes,alejandroEsc/kubernetes,chestack/kubernetes,krmayankk/kubernetes,kubernetes/kubernetes,sdminonne/kubernetes,ravilr/kubernetes,mkumatag/kubernetes,weiwei04/kubernetes,jackfrancis/kubernetes,bparees/kubernetes,kpgriffith/kubernetes,hex108/kubernetes,x13n/kubernetes,ingvagabund/kubernetes,Clarifai/kubernetes,feiskyer/kubernetes,linux-on-ibm-z/kubernetes,enj/kubernetes,BenTheElder/kubernetes,lojies/kubernetes,fanzhangio/kubernetes,joelsmith/kubernetes,zhouhaibing089/kubernetes,Clarifai/kubernetes,Acidburn0zzz/kubernetes,xlgao-zju/kubernetes,rafax/kubernetes,nak3/kubernetes,GulajavaMinistudio/kubernetes,warmchang/kubernetes,csrwng/kubernetes,mikebrow/kubernetes,k82/kubernetes,openshift/kubernetes,mosoft521/kubernetes,PiotrProkop/kubernetes,thockin/kubernetes,roberthbailey/kubernetes,nak3/kubernetes,carlory/kubernetes,micahhausler/kubernetes,joelsmith/kubernetes,x13n/kubernetes,chrislovecnm/kubernetes,saad-ali/kubernetes,shyamjvs/kubernetes,warmchang/kubernetes,tengqm/kubernetes,matthyx/kubernetes,deads2k/kubernetes,roberthbailey/kubernetes,PI-Victor/kubernetes,Acidburn0zzz/kubernetes,dixudx/kubernetes,iterion/kubernetes,jingxu97/kubernetes,xychu/kubernetes,humblec/kubernetes,jsafrane/kubernetes,zhangmingld/kubernetes,carlory/kubernetes,carlory/kubernetes,pires/kubernetes,aledbf/kubernetes,pires/kubernetes,brendandburns/kubernetes,chrislovecnm/kubernetes,mfojtik/kubernetes,csrwng/kubernetes,aledbf/kubernetes,ping035627/kubernetes,lojies/kubernetes,nckturner/kubernetes,roberthbailey/kubernetes,kubernetes/kubernetes,aledbf/kubernetes,bparees/kubernetes,ravilr/kubernetes,openshift/kubernetes,warmchang/kubernetes,idvoretskyi/kubernetes,iameli/kubernetes,mosoft521/kubernetes,linux-on-ibm-z/kubernetes,krmayankk/kubernetes,linux-on-ibm-z/kubernetes,chestack/kubernetes,dims/kubernetes,openshift/kubernetes,linux-on-ibm-z/kubernetes,tpepper/kubernetes,soltysh/kubernetes,csrwng/kubernetes,k82cn/kubernetes,dereknex/kubernetes,mfojtik/kubernetes,fabriziopandini/kubernetes,k82/kubernetes,xychu/kubernetes,carlory/kubernetes,mikebrow/kubernetes,aledbf/kubernetes,k82cn/kubernetes,nikhita/kubernetes,jdef/kubernetes,rnaveiras/kubernetes,nckturner/kubernetes,zhouhaibing089/kubernetes,x13n/kubernetes,ingvagabund/kubernetes,gnufied/kubernetes,thockin/kubernetes,hex108/kubernetes,kitt1987/kubernetes,tengqm/kubernetes,nikhita/kubernetes,dims/kubernetes,mengqiy/kubernetes,dims/kubernetes,mengqiy/kubernetes,mosoft521/kubernetes,k82cn/kubernetes,nak3/kubernetes,micahhausler/kubernetes,liggitt/kubernetes,feiskyer/kubernetes,monopole/kubernetes,openshift/kubernetes,mosoft521/kubernetes,warmchang/kubernetes,fabriziopandini/kubernetes,jingxu97/kubernetes,fanzhangio/kubernetes,krmayankk/kubernetes,mkumatag/kubernetes,dereknex/kubernetes,jagosan/kubernetes,soltysh/kubernetes,iameli/kubernetes,verult/kubernetes,PI-Victor/kubernetes,coolsvap/kubernetes,Acidburn0zzz/kubernetes,soltysh/kubernetes,spzala/kubernetes,k82/kubernetes,ravilr/kubernetes,saad-ali/kubernetes,xlgao-zju/kubernetes,nak3/kubernetes,ping035627/kubernetes,liggitt/kubernetes,thockin/kubernetes,ingvagabund/kubernetes,bparees/kubernetes,rrati/kubernetes,chestack/kubernetes,PiotrProkop/kubernetes,ii/kubernetes,tpepper/kubernetes,MikeSpreitzer/kubernetes,weiwei04/kubernetes,rafax/kubernetes,verult/kubernetes,cblecker/kubernetes,feiskyer/kubernetes,bparees/kubernetes,sdminonne/kubernetes,pires/kubernetes,cblecker/kubernetes,pires/kubernetes,matthyx/kubernetes,idvoretskyi/kubernetes,mikedanese/kubernetes,shyamjvs/kubernetes,nak3/kubernetes,Clarifai/kubernetes,iterion/kubernetes,x13n/kubernetes,dlorenc/kubernetes,gnufied/kubernetes,monopole/kubernetes,roberthbailey/kubernetes,sdminonne/kubernetes,deads2k/kubernetes,saad-ali/kubernetes,jingxu97/kubernetes,nckturner/kubernetes,mkumatag/kubernetes,andrewrynhard/kubernetes,li-ang/kubernetes,thockin/kubernetes,fabriziopandini/kubernetes,sdminonne/kubernetes,saad-ali/kubernetes,iterion/kubernetes,xychu/kubernetes,jagosan/kubernetes,jdef/kubernetes,wongma7/kubernetes,jessfraz/kubernetes,tpepper/kubernetes,tengqm/kubernetes,jdef/kubernetes,dlorenc/kubernetes,alejandroEsc/kubernetes,jagosan/kubernetes,olivierlemasle/kubernetes,mikedanese/kubernetes,dlorenc/kubernetes,jsafrane/kubernetes,MikeSpreitzer/kubernetes,nckturner/kubernetes,lojies/kubernetes,mikedanese/kubernetes,cblecker/kubernetes,andrewrynhard/kubernetes,PI-Victor/kubernetes,kevin-wangzefeng/kubernetes,cofyc/kubernetes,idvoretskyi/kubernetes,verult/kubernetes,x13n/kubernetes,aledbf/kubernetes,rrati/kubernetes,MikeSpreitzer/kubernetes,ii/kubernetes,tengqm/kubernetes,xychu/kubernetes,olivierlemasle/kubernetes,verb/kubernetes,kpgriffith/kubernetes,kevin-wangzefeng/kubernetes,GulajavaMinistudio/kubernetes,mfojtik/kubernetes,idvoretskyi/kubernetes,rrati/kubernetes,xlgao-zju/kubernetes,tengqm/kubernetes,matthyx/kubernetes,GulajavaMinistudio/kubernetes,dims/kubernetes,thockin/kubernetes,ravilr/kubernetes,micahhausler/kubernetes,li-ang/kubernetes,humblec/kubernetes,fanzhangio/kubernetes,monopole/kubernetes,tpepper/kubernetes,xychu/kubernetes,weiwei04/kubernetes,dereknex/kubernetes,coolsvap/kubernetes,shyamjvs/kubernetes,enj/kubernetes,coolsvap/kubernetes,verult/kubernetes,jackfrancis/kubernetes,bparees/kubernetes,gnufied/kubernetes,li-ang/kubernetes,kitt1987/kubernetes,roberthbailey/kubernetes,jessfraz/kubernetes,andrewrynhard/kubernetes,zhouhaibing089/kubernetes,dereknex/kubernetes,iterion/kubernetes,jessfraz/kubernetes,feiskyer/kubernetes,nikhita/kubernetes,deads2k/kubernetes,MikeSpreitzer/kubernetes,cofyc/kubernetes,weiwei04/kubernetes,shyamjvs/kubernetes,hex108/kubernetes,brendandburns/kubernetes,dereknex/kubernetes,ingvagabund/kubernetes,alejandroEsc/kubernetes,ping035627/kubernetes,monopole/kubernetes,pires/kubernetes,mfojtik/kubernetes,hex108/kubernetes,idvoretskyi/kubernetes,humblec/kubernetes,spzala/kubernetes,dlorenc/kubernetes,jdef/kubernetes,fabriziopandini/kubernetes,micahhausler/kubernetes,linux-on-ibm-z/kubernetes,rnaveiras/kubernetes,chrislovecnm/kubernetes,kitt1987/kubernetes,k82/kubernetes,soltysh/kubernetes,mahak/kubernetes,xlgao-zju/kubernetes,nikhita/kubernetes,jdef/kubernetes,brendandburns/kubernetes,jackfrancis/kubernetes,andrewrynhard/kubernetes,mkumatag/kubernetes,kpgriffith/kubernetes,Acidburn0zzz/kubernetes,rnaveiras/kubernetes,zhangmingld/kubernetes,cofyc/kubernetes,cofyc/kubernetes,mfojtik/kubernetes,Clarifai/kubernetes,alejandroEsc/kubernetes,soltysh/kubernetes,matthyx/kubernetes,liggitt/kubernetes,dixudx/kubernetes,matthyx/kubernetes,spzala/kubernetes,spzala/kubernetes,jingxu97/kubernetes,k82cn/kubernetes,liggitt/kubernetes,joelsmith/kubernetes,iterion/kubernetes,GulajavaMinistudio/kubernetes,iterion/kubernetes,li-ang/kubernetes,enj/kubernetes,tpepper/kubernetes,cblecker/kubernetes,zhangmingld/kubernetes,k82/kubernetes,dims/kubernetes,saad-ali/kubernetes,fanzhangio/kubernetes,deads2k/kubernetes,andrewrynhard/kubernetes,kpgriffith/kubernetes,mosoft521/kubernetes,mikebrow/kubernetes,cofyc/kubernetes,jsafrane/kubernetes,idvoretskyi/kubernetes,cofyc/kubernetes,verult/kubernetes,dereknex/kubernetes,chestack/kubernetes,wongma7/kubernetes,lojies/kubernetes,verb/kubernetes,MikeSpreitzer/kubernetes,zhangmingld/kubernetes,tpepper/kubernetes,ping035627/kubernetes,mkumatag/kubernetes,kubernetes/kubernetes,kevin-wangzefeng/kubernetes,verb/kubernetes,lojies/kubernetes,mikedanese/kubernetes,ii/kubernetes,k82cn/kubernetes,mahak/kubernetes,pires/kubernetes,coolsvap/kubernetes,iameli/kubernetes,mikebrow/kubernetes,verb/kubernetes,rrati/kubernetes,x13n/kubernetes,PI-Victor/kubernetes,gnufied/kubernetes,kpgriffith/kubernetes,zhouhaibing089/kubernetes,mikebrow/kubernetes,kubernetes/kubernetes,ping035627/kubernetes,jessfraz/kubernetes,nikhita/kubernetes,li-ang/kubernetes,jdef/kubernetes