Backport of Consul Documentation restructure according to IA & content strategy into release/1.21.x#22318

hc-github-team-consul-core wants to merge 3 commits intorelease/1.21.xhashicorp/consul:release/1.21.xfrom

backport/main/rarely-poetic-calfhashicorp/consul:backport/main/rarely-poetic-calfCopy head branch name to clipboard