Backport of add some initial CODEOWNERS into release/1.16.x#18375

hc-github-team-consul-core merged 2 commits intorelease/1.16.xhashicorp/consul:release/1.16.xfrom

backport/staff-codeowners/gratefully-bright-buffalohashicorp/consul:backport/staff-codeowners/gratefully-bright-buffaloCopy head branch name to clipboard