cls_lock: expired lock before unlock and start check

cls_lock: expired lock before unlock and start check

If the lock expired, the stat check shouldn't return -ENOENT,
We will change the lock duration to prevent lock expired before the
stat check.

Fixes: https://tracker.ceph.com/issues/56575
Signed-off-by: Nitzan Mordechai <nmordec@redhat.com>
(cherry picked from commit d3457c64b1bdc26a4379197ae206019a615d2ebc)

Comment from @idryomov:

There is a delta between the original commit and the backport due
to #45762 [1] not getting backported to quincy.

[1] https://github.com/ceph/ceph/pull/45762