Merge PR #52751 into wip-61794-reef

Merge PR #52751 into wip-61794-reef

* refs/pull/52751/head:
	PendingReleaseNotes: support for subvolumes and subvolume groups in snap_schedule
	snap_schedule/tests: fix db upgrade issue
	qa: add yaml for on demand subvol version testing
	qa: add test cases for testing --subvol and --group arguments
	mgr/volumes: conditionalize subvolume upgrade
	mgr/volumes: ensure correct init of v1 subvol
	mgr/snap_schedule: add subvol and subvol group arguments to cli
	mds/snap_schedule: add subvolume group column management
	mgr/volumes: add remote helper methods to fetch subvolume info
	mgr/snap_schedule: catch all exceptions for cli

Reviewed-by: Venky Shankar <vshankar@redhat.com>