[redhat] gitlab-ci: Use cki-tools builder image for scheduled jobs
Instead of having dnf install commands as part of the daily scheduled jobs, bake the necessary packages into the image used by the job.
In cki-tools!1301 (merged) we add the necessary bits to the cki-tools image so now we can use that image and drop the dnf commands from the CI definition.
Fixes: #159 (closed)
Signed-off-by: Patrick Talbert ptalbert@redhat.com