Merge PR #36603 into master

* refs/pull/36603/head:
	test: add test for setting ceph mirror virtual xattr
	tests/pybind/cephfs: cleanup xattrs before starting tests
	client: filter ceph.* xattrs from listing
	client: force an attr fetch for ceph xattrs
	client: changes for ceph.mirror.info xattr
	mds: restrict setting/removing certain xattrs in ceph namespace
	mds: introduce ceph.mirror.info virtual xattr
	mds: customize xattr handling using dispatch handlers
	mds: introduce is_ceph_vxattr() helper

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>

diff --cc src/mds/Server.cc
Simple merge