Merge PR #47218 into main

Merge PR #47218 into main

* refs/pull/47218/head:
	mon/MDSMonitor: fix check for standby reversion
	mds: update comment about standby-replay daemons holding a rank
	qa: test for standby-replay removal in MDSMonitor::prepare_beacon
	mds: add inject config for synthetic health message

Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Ramana Raja <rraja@redhat.com>
Reviewed-by: Greg Farnum <gfarnum@redhat.com>
Reviewed-by: Kotresh Hiremath Ravishankar <khiremat@redhat.com>
Reviewed-by: Milind Changire <mchangir@redhat.com>