Merge PR #17266 into master

* refs/pull/17266/head:
	qa: update test_ceph_argparse to test fs cmds
	qa: use fs rm_data_pool
	qa: fix mdsmap lookup
	qa: remove usage of mds dump
	PendingReleaseNotes: add obsoleted mds commands
	qa: remove use of obsolete mds commands
	ceph_volume_client: remove use of obsolete mds cmd
	doc: update on obsolete mds commands
	cephfs: obsolete deprecated mds commands

Reviewed-by: Douglas Fuller <dfuller@redhat.com>

diff --cc qa/tasks/ceph_manager.py
Simple merge

diff --cc qa/tasks/cephfs/filesystem.py
Simple merge

diff --cc src/common/legacy_config_opts.h
Simple merge

diff --cc src/mon/MDSMonitor.cc
Simple merge

diff --cc src/mon/MonCommands.h
Simple merge

diff --cc src/test/pybind/test_ceph_argparse.py
Simple merge