repocheck: enable Rocky testing for Leap 42.3
repocheck: enable Rocky testing for Leap 42.3

The upstream OSA Rocky modules use this combination, so we better
at least do a repocheck for it.

SUSE-Cloud/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation,SUSE-Cloud/automation,gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,aspiers/automation,aspiers/automation,gosipyan/automation,gosipyan/automation