docker2podman: skip some role imports from handler

docker2podman: skip some role imports from handler

when running docker-to-podman playbook, there's no need to call
`ceph-config` and `ceph-rgw` from the role `ceph-handler`.
It can even have side effects when coming from a baremetal cluster that
was previously migrated using the switch-to-containers playbook. Indeed
it might complain about missing .target systemd unit since they are
removed during that migration.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1944999
Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>