etcdserver: fix cannot promote member from follower when auth is enabled#21504

yashrajshuklaaa wants to merge 1 commit intoetcd-io:release-3.5etcd-io/etcd:release-3.5from

yashrajshuklaaa:fix-promote-auth-3.5yashrajshuklaaa/etcd:fix-promote-auth-3.5Copy head branch name to clipboard