upgrade redis to 5.0.9

Igorrequested to merge
redis-5.0.9 into master

What does this MR do?

This change includes a performance improvement that should reduce CPU utilization on our gitlab.com redis-sidekiq fleet by 10% (source).

From the upstream changelog:

    * NEW: Clients blocked on the same key are now unblocked on
           O(1) time. Backported from Redis 6.

Related issues

Checklist

See Definition of done.

  • Changelog entry created. Not applicable for Documentation changes and minor changes.
  • Documentation created/updated
  • Tests added
  • Integration tests added to GitLab QA, if applicable
  • MR targeting master branch
  • MR has a green pipeline on GitLab.com
  • Equivalent MR/issue for CNG opened if applicable
  • trigger-package has a green pipeline running against latest commit

Reviewer Checklist

In addition to above, reviewer must:

  • Pipeline is green on dev.gitlab.org if the change is not touching documentation or internal cookbooks
Edited by GitLab Release Tools Bot

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