Merge PR #25132 into master

Merge PR #25132 into master

* refs/pull/25132/head:
	os/bluestore: implement kv update on bluefs extents info change.
	os/bluestore: use original algorithm to calculate BlueFS gift size for explicit allocation.
	os/bluestore: get rid of bluefs space gifting performed in background
	os/bluestore: do KV/FM/allocator opening in two stages.
	os/bluestore: detach FreelistManager from DB instance.
	test/osd/store_test: add test case for explicit bluefs expanding.
	os/bluestore: implement explicit bluefs space allocation at slow device
	os/bluestore: unify allocator dump on bluefs space failures
	os/bluestore: stop keeping bluefs_extents at KV

Reviewed-by: Sage Weil <sage@redhat.com>