doc/cephfs/add-remove-mds: added cephadm note, refined "Adding an MDS"
Description: 1) Add a note about using cephadm for setting up the
cluster and mds(s), also mention the use of ceph
orchestrator if one needs to setup mds(s) manually.
2) Changed the term `data point` to `directory` in
point 1 under "Adding an MDS" section for better
clarity.
Fixes: https://tracker.ceph.com/issues/54551
Signed-off-by: Dhairya Parmar <dparmar@redhat.com>
(cherry picked from commit
9e8e1a250e1192cdb1b86650596543d42a2f0401)