Merge PR #62055 into wip-jcollin-testing-20251203.125108-squid

Merge PR #62055 into wip-jcollin-testing-20251203.125108-squid

* refs/pull/62055/head:
	mds: client is evicted when an export subtree task is interrupted
	qa: add test for importer's unexpected client eviction after an export subtree task is interrupted
	mds: session in the importing state cannot be cleared if an export subtree task is interrupted while the state of importer is acking
	qa: add test for importer's session cleanup after an export subtree task is interrupted
	mds: the assert should be before the journal entry submit otherwise it's racy
	mds: add `importing_count` to session dump