Backport: Update gitlab-runner to v0.93.0

What does this MR do?

Backport !5365 (merged) to chart 10.4/GitLab 19.4 to sync Runner and GitLab version.

Related issues

Author checklist

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Required

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• Merge Request Title and Description are up to date, accurate, and descriptive.
• MR targeting the appropriate branch.
• MR has a green pipeline.
• Documentation created/updated.
• Tests added/updated.
• Have you validated that your change works end-to-end on a real cluster deployment?
  • Describe how you did it in a comment.
• Equivalent MR/issue for omnibus-gitlab opened.
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Reviewers checklist

• As soon as you begin reviewing, select Start a review on your first comment so the MR shows Reviewer started review.
• MR has a green pipeline on https://gitlab.com/gitlab-org/charts/gitlab.
• Consider downstream impact to the Operator, as per evaluating impact from changes to GitLab chart.