publics/etcd-io__etcd @ release-3.4

Gyuho Lee 4707d7a196 vendor: upgrade grpc-go to v1.22.1		5 lat temu
..
grpclog.go	4707d7a196 vendor: upgrade grpc-go to v1.22.1	5 lat temu
logger.go	6572d605ad vendor: Bump to grpc v1.12.2	6 lat temu
loggerv2.go	b1e87f8ae1 cmd: move "cmd/vendor" to root, remove "cmd"	6 lat temu