[release-20.0-rc] Release of v20.0.0

[shlomi-noach]

Includes the release notes and release commit for the v20.0.0 release. Once this PR is merged, we will be able to tag v20.0.0 on the merge commit.

[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

• Bug fixes should have at least one unit or end-to-end test, enhancement and new features should have a sufficient number of tests.

Documentation

• Apply the release notes (needs details) label if users need to know about this change.
• New features should be documented.
• There should be some code comments as to why things are implemented the way they are.
• There should be a comment at the top of each new or modified test to explain what the test does.

New flags

• Is this flag really necessary?
• Flag names must be clear and intuitive, use dashes (-), and have a clear help text.

If a workflow is added or modified:

• Each item in Jobs should be named in order to mark it as required.
• If the workflow needs to be marked as required, the maintainer team must be notified.

Backward compatibility

• Protobuf changes should be wire-compatible.
• Changes to _vt tables and RPCs need to be backward compatible.
• RPC changes should be compatible with vitess-operator
• If a flag is removed, then it should also be removed from vitess-operator and arewefastyet, if used there.
• 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 68.53%. Comparing base (eef7761) to head (43a81d9).

Additional details and impacted files

@@                 Coverage Diff                 @@
##           release-20.0-rc   #16258      +/-   ##
===================================================
+ Coverage            68.51%   68.53%   +0.02%     
===================================================
  Files                 1541     1541              
  Lines               197788   197788              
===================================================
+ Hits                135505   135553      +48     
+ Misses               62283    62235      -48     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[frouioui]

Added 722aafb to remove the duplicated entries in the changelog file. There is an issue with the release note generation, milestone and the new GA process that I have not gotten to yet. This is a manual workaround.