Backport: Update gitlab-runner to v0.91.0

Clemens Beckrequested to merge
cb/backport-runner-0910 into 10-2-stable

What does this MR do?

Backport !5201 (merged) to sync runner (19.2) and GitLab version on the newest stable branch (chart 10.2 ships GitLab 19.2).

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