[1.14.x] Vault CA provider clean up previous default issuers (#18773)#18785

kisunji merged 4 commits intorelease/1.14.xhashicorp/consul:release/1.14.xfrom

backport/1.14.x-vault-ca-clean-unused-issuershashicorp/consul:backport/1.14.x-vault-ca-clean-unused-issuersCopy head branch name to clipboard