switch-from-non-containerized-to-containerized: mask unit files

switch-from-non-containerized-to-containerized: mask unit files

We must mask the image so we are sure that even if the system reboots
then the OSDs won't start.

Also remove Ceph udev rules if found on the system prior to deploy
containers. If we don't do this we are exposed to conflicts between udev
rules and sytemd unit files.

Also add the CI will now test the migration from a non-containerized cluster to a
containerized cluster.

Signed-off-by: Sébastien Han <seb@redhat.com>