Backport of Allow HCP metrics collection for Envoy proxies into release/1.15.x#16609

hc-github-team-consul-core wants to merge 5 commits intorelease/1.15.xhashicorp/consul:release/1.15.xfrom

backport/cc-4361/hcp-metrics-bootstrap-config/manually-composed-snailhashicorp/consul:backport/cc-4361/hcp-metrics-bootstrap-config/manually-composed-snailCopy head branch name to clipboard