Merge PR #26389 into master

Merge PR #26389 into master

* refs/pull/26389/head:
	message/MMonMgrReport: conditionally reencode PGMapDigest
	qa/suites/upgrade/luminous-x/parallel: enable all classes
	qa/suites/upgrade/luminous-x/parallel/5-final-workload/rados_mon_thrash: use x branch
	qa/suites/upgade/luminous-x: pglog_hardlimit succeeds now on luminous due to backport
	mgr/DaemonServer: use a luminous-compatible 'mgr metadata' command
	mgr/Mgr: print bad (non-object) json
	qa/suites/upgrade/luminous-x/stress-split: mons on separate hosts, enable msgr2
	qa/suites/upgrade/luminous-x/parallel: mon per host, msgr2
	qa/suites/upgrade/luminous-x: whitelist 'slow request'
	mon/HealthMonitor: add mon_warn_on_msgr2_not_enabled

Reviewed-by: Josh Durgin <jdurgin@redhat.com>
Reviewed-by: Neha Ojha <nojha@redhat.com>