Merge PR #34552 into master

* refs/pull/34552/head:
	tests: add snap schedule tests
	snap-schedule: reject invalid retention specs
	mgr/snap_schedule: log snapshot name on creation
	pybind / snap_schedule: sanely dump schedules and retention specs
	pybind/snap_schedule: config option to allow minute granularity snaps
	pybind / snap_schedule: remove 'SNAP_SCHED_TESTING' check

Reviewed-by: Jan Fajerski <jfajerski@suse.com>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>