Add v1.42.0 release of grpc-go to interop matrix (#27985)
Add v1.42.0 release of grpc-go to interop matrix (#27985)


jtattermusch/grpc,stanley-cheung/grpc,vjpai/grpc,jtattermusch/grpc,ejona86/grpc,nicolasnoble/grpc,nicolasnoble/grpc,ejona86/grpc,ctiller/grpc,vjpai/grpc,vjpai/grpc,jtattermusch/grpc,stanley-cheung/grpc,ejona86/grpc,grpc/grpc,nicolasnoble/grpc,nicolasnoble/grpc,stanley-cheung/grpc,grpc/grpc,ctiller/grpc,stanley-cheung/grpc,vjpai/grpc,grpc/grpc,grpc/grpc,ctiller/grpc,grpc/grpc,grpc/grpc,stanley-cheung/grpc,jtattermusch/grpc,ctiller/grpc,ejona86/grpc,ejona86/grpc,nicolasnoble/grpc,jtattermusch/grpc,nicolasnoble/grpc,nicolasnoble/grpc,vjpai/grpc,stanley-cheung/grpc,stanley-cheung/grpc,grpc/grpc,vjpai/grpc,jtattermusch/grpc,ejona86/grpc,ctiller/grpc,nicolasnoble/grpc,stanley-cheung/grpc,vjpai/grpc,ctiller/grpc,grpc/grpc,ejona86/grpc,nicolasnoble/grpc,ejona86/grpc,ctiller/grpc,stanley-cheung/grpc,vjpai/grpc,ctiller/grpc,jtattermusch/grpc,ejona86/grpc,vjpai/grpc,ejona86/grpc,stanley-cheung/grpc,grpc/grpc,jtattermusch/grpc,stanley-cheung/grpc,vjpai/grpc,ctiller/grpc,vjpai/grpc,grpc/grpc,ctiller/grpc,nicolasnoble/grpc,stanley-cheung/grpc,grpc/grpc,ctiller/grpc,jtattermusch/grpc,nicolasnoble/grpc,jtattermusch/grpc,ejona86/grpc,nicolasnoble/grpc,vjpai/grpc,ejona86/grpc,grpc/grpc,jtattermusch/grpc,jtattermusch/grpc,ctiller/grpc