ci/fluster: Move the fluster-runner.sh script

The fluster-runner.sh was only runner srcipt in a folder, move it out of
the fluster folder.

Signed-off-by: Valentine Burley <valentine.burley@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34787>

.gitlab-ci/prepare-artifacts.sh

@@ -36,7 +36,6 @@ echo "$(cat VERSION) (git-$git_sha)" > install/VERSION
 cp -Rp .gitlab-ci/bare-metal install/
 cp -Rp .gitlab-ci/common install/
 cp -Rp .gitlab-ci/piglit install/
-cp -Rp .gitlab-ci/fluster install/
 cp -Rp .gitlab-ci/fossils.yml install/
 cp -Rp .gitlab-ci/fossils install/
 cp -Rp .gitlab-ci/fossilize-runner.sh install/