Geo: Investigate Interaction of Patroni standby cluster with pause and resume command

• We can pause replication via wal_resume/pause for Repmgr? and for regualr DBs.
• Does this work with Patroni?
• if not supported, we need to document that (and fail gracefully)
• https://docs.gitlab.com/ee/administration/geo/#pausing-and-resuming-replication