Backport of fix: stop peering delete routine on leader loss into release/1.15.x#17701

hc-github-team-consul-core merged 1 commit intorelease/1.15.xhashicorp/consul:release/1.15.xfrom

backport/dans/fix-namespace-deletion-watch/sharply-trusting-heronhashicorp/consul:backport/dans/fix-namespace-deletion-watch/sharply-trusting-heronCopy head branch name to clipboard