[slack-22.0]: backports: Vdiff bug fixes from v2202

[tanjinx]

Description

backports:

• [release-22.0] Fix: Improve VDiff internal query performance (#18579) vitessio/vitess#18632
• [release-22.0] Fix a panic in VDiff when reconciling extra rows. (#18585) vitessio/vitess#18596

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 69.73%. Comparing base (b1ab347) to head (fc11b3d).
⚠️ Report is 20 commits behind head on slack-22.0.

Additional details and impacted files

@@              Coverage Diff               @@
##           slack-22.0     #746      +/-   ##
==============================================
+ Coverage       67.53%   69.73%   +2.20%     
==============================================
  Files            1600     1604       +4     
  Lines          261782   213312   -48470     
==============================================
- Hits           176786   148747   -28039     
+ Misses          84996    64565   -20431     

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[github-actions]

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[github-actions]

This PR was closed because it has been stale for 7 days with no activity.