Merge PR #61856 into wip-jcollin-testing-20250826.035708-squid

Merge PR #61856 into wip-jcollin-testing-20250826.035708-squid

* refs/pull/61856/head:
	qa: remove redundant and broken test
	mds: skip scrubbing damaged dirfrag
	tools/cephfs/DataScan: test equality of link including frag
	tools/cephfs/DataScan: skip linkages that have been removed
	tools/cephfs/DataScan: do not error out when failing to read a dentry
	tools/cephfs/DataScan: create all ancestors during scan_inodes
	tools/cephfs/DataScan: cleanup debug prints
	qa: remove old MovedDir test
	qa: add data scan tests for ancestry rebuild
	qa: make the directory non-empty to force migration
	qa: avoid unnecessary mds restart