Without this patch, dependabot will still try to bump some k8s
dependencies.
This is a problem, as we need to bump them together, manually.
This should fix it by removing them all from dependabot.
Without this patch, we'll get kubernetes updates.
This is not necessary, and could be even a problem on merge:
those kubernetes updates are done separately, knowingly,
to respect the life cycle of the kubernetes we need
(and stay one version below latest to have a larger coverage
of versions).
We could keep dependabot to update those on a lower frequency,
but that sounds clunky and not great. Instead disable them all,
and rely on the team to do this regular maintenance work.
