Bump the dependency on kubernetes.core to versions >=3.0.1 and remove
the workaround introduced by 4429ac8c03.
Signed-off-by: Felix Matouschek <fmatouschek@redhat.com>
This adds yamllint to the CI linter job and sets the maximum line
length to 140 like in kubevirt/kubevirt.
Signed-off-by: Felix Matouschek <fmatouschek@redhat.com>