kubeadm errors out if 'all' is specified with specific checks, so check
that case when we add hardcoded checks.
Add a test to catch regression.
Co-authored-by: Max Gautier <mg@max.gautier.name>
- Take advantage of `parallel:matrix` to make the jobs definition shorter
and more readable.
- Remove helper scripts which are no longer needed
- Remove redundant indirection in the gitlab-ci pipelines definitions
(only one user)