[slack-22.0] ci backports from release v22.0.2

[tanjinx]

Description

backport:

• [CI] Use the draft state from the event payload instead of calling curl. vitessio/vitess#18650
• [release-22.0] ci: use the newest mysql apt config package (#18790) vitessio/vitess#18793
• [release-22.0] ci: DRY up MySQL Setup (#18815) vitessio/vitess#18836
• [release-22.0] ci: extract os tuning (#18824) vitessio/vitess#18826

Related Issue(s)

Checklist

• "Backport to:" labels have been added if this change should be back-ported to release branches
• If this change is to be back-ported to previous releases, a justification is included in the PR description
• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on CI?
• Documentation was added or is not required

Deployment Notes

AI Disclosure

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.74%. Comparing base (b1ab347) to head (d35b362).
⚠️ Report is 20 commits behind head on slack-22.0.

Additional details and impacted files

@@              Coverage Diff               @@
##           slack-22.0     #745      +/-   ##
==============================================
+ Coverage       67.53%   69.74%   +2.21%     
==============================================
  Files            1600     1604       +4     
  Lines          261782   213314   -48468     
==============================================
- Hits           176786   148781   -28005     
+ Misses          84996    64533   -20463     

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