Backport of [release/1.15.3] Add cloud stanza documentation into release/1.15.x#17353

hc-github-team-consul-core wants to merge 2 commits intorelease/1.15.xhashicorp/consul:release/1.15.xfrom

backport/jer/cloud-docs/gratefully-stunning-froghashicorp/consul:backport/jer/cloud-docs/gratefully-stunning-frogCopy head branch name to clipboard