mgr/dashboard: show partially deleted RBDs

mgr/dashboard: show partially deleted RBDs

An RBD might be partially deleted if the deletion
process has been started but was interrupted. In
this case return the RBD as part of the RBD list
and mark it as partially deleted.

Fixes: https://tracker.ceph.com/issues/48603
Signed-off-by: Tatjana Dehler <tdehler@suse.com>
(cherry picked from commit d83c277ac1861df31d2a39d16e20c7bebbea676e)

Conflicts:
	src/pybind/mgr/dashboard/frontend/src/app/ceph/block/rbd-details/rbd-details.component.html
	src/pybind/mgr/dashboard/frontend/src/app/ceph/block/rbd-list/rbd-list.component.spec.ts
	src/pybind/mgr/dashboard/frontend/src/app/ceph/block/rbd-list/rbd-list.component.ts
	src/pybind/mgr/dashboard/services/rbd.py
	src/pybind/mgr/dashboard/tests/test_rbd_service.py
Resolved various conflicts because octopus and
master diverged a lot.