mgr/rbd_support: remove localized schedule option during module startup

mgr/rbd_support: remove localized schedule option during module startup

The localized schedule option was removed during every load of a
scheduler handler. This occured multiple times during a mgr process's
lifespan. Instead, remove the localized schedule module option when the
rbd_support module starts up.

Fixes: https://tracker.ceph.com/issues/57726
Signed-off-by: Ramana Raja <rraja@redhat.com>
(cherry picked from commit 377840a746e4d47b77e24648b06f53f4a52315c1)

Conflicts:
       src/pybind/mgr/rbd_support/mirror_snapshot_schedule.py
       src/pybind/mgr/rbd_support/schedule.py
       src/pybind/mgr/rbd_support/trash_purge_schedule.py
 - Above conflicts were due to commit e4a16e2
   ("mgr/rbd_support: add type annotation") not in pacific