After recent changes (increasing the parallelism of the pipeline
by reducing the number of stages, introducing FreeBSD builds that
take longer than any other job), the difference between running
the full pipeline or a reduced one has basically disappeared: in
both cases, the completion time is around 25-35 minutes depending
on whether containers need to be rebuilt and how many shared
runners are available.

Reduce the complexity of our .gitlab-ci.yml and make things
simpler for contributors by simply always running all jobs.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>