staging-v25.3.4: release-25.3: server: return draining progress if the server controller is draining#156313

celiala merged 1 commit intostaging-v25.3.4cockroachdb/cockroach:staging-v25.3.4from

blathers/backport-staging-v25.3.4-155634cockroachdb/cockroach:blathers/backport-staging-v25.3.4-155634Copy head branch name to clipboard