mds: remove the cap directly when releasing the cap

mds: remove the cap directly when releasing the cap

In case:

           mds                             client
	                        - Releases cap and put Inode
  - Increase cap->seq and sends
    revokes req to the client
  - Receives release req and    - Receives & drops the revoke req
    skip removing the cap and
    then eval the CInode and
    issue or revoke caps again.
                                - Receives & drops the caps update
			          or revoke req
  - Health warning for client
    isn't responding to
    mclientcaps(revoke)

Fixes: https://tracker.ceph.com/issues/57244
Signed-off-by: Xiubo Li <xiubli@redhat.com>