[Docs] Add docs for memberlist metrics (#14753)
[Docs] Add docs for memberlist metrics (#14753)

* Add metrics for consul.memberlist.node.instances, consul.memberlist.queue.broadcast, consul.memberlist.size.local, and consul.memberlist.size.remote

* Fixing last table on page that does not render properly

* fixing queue name
hashicorp/consul,hashicorp/consul,hashicorp/consul,hashicorp/consul