Merge PR #51251 into main

* refs/pull/51251/head:
	PendingReleaseNotes: add a note about deleting files from lost+found directory
	qa: add checks that validate removal of entries from lost+found dir
	mds: allow unlink operation under lost+found directory

Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>

diff --cc qa/tasks/cephfs/test_data_scan.py
Simple merge

diff --cc src/mds/Server.cc
Simple merge