Fix Ruby xDS v3 Interop docker image (#28926)
Fix Ruby xDS v3 Interop docker image (#28926)

Same as #28859, but for xDS v3.
grpc/grpc,jtattermusch/grpc,nicolasnoble/grpc,jtattermusch/grpc,vjpai/grpc,stanley-cheung/grpc,nicolasnoble/grpc,vjpai/grpc,vjpai/grpc,ejona86/grpc,jtattermusch/grpc,nicolasnoble/grpc,stanley-cheung/grpc,grpc/grpc,vjpai/grpc,vjpai/grpc,stanley-cheung/grpc,nicolasnoble/grpc,ejona86/grpc,vjpai/grpc,nicolasnoble/grpc,jtattermusch/grpc,ejona86/grpc,ejona86/grpc,ctiller/grpc,stanley-cheung/grpc,nicolasnoble/grpc,jtattermusch/grpc,jtattermusch/grpc,jtattermusch/grpc,stanley-cheung/grpc,ctiller/grpc,jtattermusch/grpc,stanley-cheung/grpc,ctiller/grpc,stanley-cheung/grpc,nicolasnoble/grpc,jtattermusch/grpc,stanley-cheung/grpc,ejona86/grpc,stanley-cheung/grpc,jtattermusch/grpc,vjpai/grpc,ejona86/grpc,nicolasnoble/grpc,nicolasnoble/grpc,jtattermusch/grpc,grpc/grpc,ejona86/grpc,grpc/grpc,stanley-cheung/grpc,grpc/grpc,ctiller/grpc,vjpai/grpc,grpc/grpc,ctiller/grpc,ejona86/grpc,stanley-cheung/grpc,stanley-cheung/grpc,ctiller/grpc,vjpai/grpc,ctiller/grpc,ctiller/grpc,jtattermusch/grpc,ejona86/grpc,ctiller/grpc,grpc/grpc,vjpai/grpc,ctiller/grpc,grpc/grpc,ejona86/grpc,ejona86/grpc,nicolasnoble/grpc,ctiller/grpc,grpc/grpc,nicolasnoble/grpc,ejona86/grpc,vjpai/grpc,ctiller/grpc,grpc/grpc,nicolasnoble/grpc,vjpai/grpc,grpc/grpc,grpc/grpc