Backport of NET-5049: subscribe to bound-api-gateway only after receiving api-gateway into release/1.15.x#18294

hc-github-team-consul-core merged 3 commits intorelease/1.15.xhashicorp/consul:release/1.15.xfrom

backport/bound-api-gtw-sub/mostly-huge-alienhashicorp/consul:backport/bound-api-gtw-sub/mostly-huge-alienCopy head branch name to clipboard