Merge PR #55792 into wip-pdonnell-testing-20240613.014923-debug

* refs/pull/55792/head:
	tools/cephfs: recover alternate_name of dentries from journal
	qa: add test to verify recovery of alternate_name from journal
	tools/cephfs/JournalTool: add some more debugging
	tools/cephfs/JournalTool: remove extraneous 0x in debug output
	mds: dump alternate_name to formatter
	mds: add warning about encoding new fields