[main] Upgrade the Golang version to go1.25.7

[vitess-bot]

This Pull Request bumps the Golang version to go1.25.7 and the bootstrap version to 52.

Do not trust the bot blindly. A thorough code review must be done to ensure all the files have been correctly modified.

cc @vitessio/release

[vitess-bot]

Hello! 👋

This Pull Request is now handled by arewefastyet. The current HEAD and future commits will be benchmarked.

You can find the performance comparison on the arewefastyet website.

[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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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.94%. Comparing base (b004c09) to head (58369fe).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #19306      +/-   ##
==========================================
- Coverage   69.95%   69.94%   -0.01%     
==========================================
  Files        1610     1610              
  Lines      216056   216056              
==========================================
- Hits       151133   151131       -2     
- Misses      64923    64925       +2     

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[timvaillancourt]

Weird. My review is requested but it won't let me add one 🤔