CI images move off the packer-images monorepo to semver-released container-* repos.
- run CI steps on docker-internal/rpmbuilder:0.1.0-<distro>
- build el9 packages from docker-internal/rpmbuilder:0.1.0-alma9
Reviewed-on: #186
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>