Backport of Preserve CARoots when updating Vault CA configuration into release/1.15.x#16626

hc-github-team-consul-core merged 4 commits intorelease/1.15.xhashicorp/consul:release/1.15.xfrom

backport/kisunji/NET-3212-vault-ca-config-update-fix/miserably-unified-storkhashicorp/consul:backport/kisunji/NET-3212-vault-ca-config-update-fix/miserably-unified-storkCopy head branch name to clipboard