Override default rabbmitq image for periodic CI

[marios]

This adds the rabbmitmq and rabbmitmq-cell1 image override so we use the right registry, namespace and tag under test in the periodic job.

[marios]

going to rebase so update incoming.
I still have draft on this because we are still not successfully overriding the rabbit container

Andrew posted a fix which is needed first there openstack-k8s-operators/openstack-operator#475

[marios]

@jistr @fao89 @cescgina hi folks please have a look when you get some time we can merge this now

after the fix at openstack-k8s-operators/openstack-operator#475 merged we can now override the rabbit image.

Here in the pull request, it defaults to quay.io/current-podified:

        * https://logserver.rdoproject.org/55/155/68fc680ea521ac3f8d573c9437c346682a88334d/github-check/data-plane-adoption-github-rdo-centos-9-crc-single-node/8ae277a/controller/pod/rabbitmq-server-0-describe.txt
        *     Image:         quay.io/podified-antelope-centos9/openstack-rabbitmq@sha256:fdd6a92fe08d0e50257e9197b13a819519b121c59e5878dbbe38baa430b8d161

And in the periodic/rdo test it takes quay.rdoproject.org with the specified hash (podified-ci-testing)

        * https://logserver.rdoproject.org/02/49902/11/check/periodic-data-plane-adoption-github-rdo-centos-9-crc-single-node-antelope/69a89ea/controller/pod/rabbitmq-server-0-describe.txt
        *     Image:         quay.rdoproject.org/podified-antelope-centos9/openstack-rabbitmq:b8b74533a641e5669a7a663e06aa0b1d