[release-23.0] ci: extract os tuning (#18824)

[vitess-bot]

Description

This is a backport of #18824

[vitess-bot]

Review Checklist

Hello reviewers! 👋 Please follow this checklist when reviewing this Pull Request.

General

• Ensure that the Pull Request has a descriptive title.
• Ensure there is a link to an issue (except for internal cleanup and flaky test fixes), new features should have an RFC that documents use cases and test cases.

Tests

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Backward compatibility

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• vtctl command output order should be stable and awk-able.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.68%. Comparing base (58344e1) to head (c6e6e48).
⚠️ Report is 10 commits behind head on release-23.0.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-23.0   #18827      +/-   ##
================================================
- Coverage         69.70%   69.68%   -0.02%     
================================================
  Files              1605     1606       +1     
  Lines            214449   214469      +20     
================================================
- Hits             149475   149458      -17     
- Misses            64974    65011      +37     

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