test_runner: use primordials in utils.js

[Ayoub-Mabrouk]

Replace native array method (.push) with primordials (ArrayPrototypePush) in lib/internal/test_runner/utils.js for consistency and security. This improves protection against prototype pollution and aligns with the primordials pattern used throughout the codebase.

[nodejs-github-bot]

Review requested:

• @nodejs/test_runner

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 88.51%. Comparing base (05d6b9b) to head (1ffec7f).
⚠️ Report is 80 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/internal/test_runner/utils.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #61204      +/-   ##
==========================================
- Coverage   88.53%   88.51%   -0.02%     
==========================================
  Files         703      703              
  Lines      208599   208613      +14     
  Branches    40229    40237       +8     
==========================================
- Hits       184685   184663      -22     
- Misses      15939    15946       +7     
- Partials     7975     8004      +29     

Files with missing lines	Coverage Δ
lib/internal/test_runner/utils.js	61.27% <0.00%> (ø)

... and 28 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[avivkeller]

@Ayoub-Mabrouk please fix the commit message to abide by the guidelines

[Ayoub-Mabrouk]

@Ayoub-Mabrouk please fix the commit message to abide by the guidelines

done, thanks