Merge PR #66723 into main

* refs/pull/66723/head:
	PendingReleaseNotes: add note for mutability of CephFS snapshot metadata
	test_cephfs.py: add tests for do_snap_md_op()
	pybind/cephfs: add python binding for ceph_do_snap_md_op()
	tests/libcephfs: add tests for snap metadata mutations
	libcephfs: provide API to mutate snapshot metadata
	mds: add MDS code to allow snap metadata mutations
	mds: rename a finisher method in Server.cc since...
	mds: enable logging for snap.cc
	client: add client code to allow snap metadata mutations

Reviewed-by: Venky Shankar <vshankar@redhat.com>