[redhat] gitlab-ci: install python-gitlab package for rawhide-release job

Patrick Talbertrequested to merge
ptalbert/kernel-ark:python_gitlab into os-build

The rawhide-release job script redhat/scripts/ci/ark-create-release.sh expects the gitlab binary to be present or it won't find Include in Releases MRs.

Signed-off-by: Patrick Talbert ptalbert@redhat.com

Edited by Jan Stancek

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