Merge PR #47649 into main

Merge PR #47649 into main

* refs/pull/47649/head:
	mds: adjust MDSRank::command_tag_path invocation of enqueue_scrub()
	doc/scrub: documented stray evaluation using recursive scrub
	qa: added testcases
	mds: make `scrub status` print flag `scrub_mdsdir`
	mds: add scrub_mdsdir to ScrubHeader
	mds: do not dump multiple JSON obj
	mds: evaluate strays while performing scrub on root path
	mds: remove inode from scrub_stack if being purged
	mds: do not scrub inode if it is purging

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