test(debug): improve the test coverage of debug.go to 100%

[zeek0x]

This PR

• Make the side effects caused by the Go runtime version mockable
• Improve the test coverage of debug to 100%

Pull Request Checklist

Please ensure your pull request meets the following requirements:

• Open your pull request against the master branch.
• All tests pass in available continuous integration systems (e.g., GitHub Actions).
• Tests are added or modified as needed to cover code changes.
• If the pull request introduces a new feature, the feature is documented in the docs/doc.md.

Thank you for contributing!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.89%. Comparing base (3dc1cd6) to head (5bfdb10).
⚠️ Report is 223 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4404      +/-   ##
==========================================
- Coverage   99.21%   98.89%   -0.33%     
==========================================
  Files          42       44       +2     
  Lines        3182     2976     -206     
==========================================
- Hits         3157     2943     -214     
- Misses         17       22       +5     
- Partials        8       11       +3     

Flag	Coverage Δ
	?
--ldflags="-checklinkname=0" -tags sonic	98.88% <100.00%> (?)
-tags go_json	98.81% <100.00%> (?)
-tags nomsgpack	98.87% <100.00%> (?)
go-1.18	?
go-1.19	?
go-1.20	?
go-1.21	?
go-1.24	98.89% <100.00%> (?)
go-1.25	98.89% <100.00%> (?)
macos-latest	98.89% <100.00%> (-0.33%)	⬇️
ubuntu-latest	98.89% <100.00%> (-0.33%)	⬇️

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