cephfs_mirror: deprecate 'peer_add' command

Fixes: https://tracker.ceph.com/issues/72683
Signed-off-by: Jos Collin <[email protected]>

Author: joscollin

src/pybind/mgr/mirroring/module.py

@@ -39,8 +39,12 @@ def snapshot_mirorr_peer_add(self,
         if remote_mon_host and cephx_key:
             conf['mon_host'] = remote_mon_host
             conf['key'] = cephx_key
-        return self.fs_snapshot_mirror.peer_add(fs_name, remote_cluster_spec,
-                                                remote_fs_name, remote_conf=conf)
+        r, out, err = self.fs_snapshot_mirror.peer_add(fs_name, remote_cluster_spec,
+                                                       remote_fs_name, remote_conf=conf)
+        out = (f"{out}\n"
+               "Warning: The 'peer_add' command is deprecated and will be removed in a "
+               "future release. Use 'peer_bootstrap' instead.\n")
+        return r, out, err
 
     @CLIReadCommand('fs snapshot mirror peer_list')
     def snapshot_mirror_peer_list(self,