util: use RegExp.escape to better escape debugEnv

[aduh95]

That way we don't need to maintain our own regex escaping

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.50%. Comparing base (d729bec) to head (bbf7688).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #60804      +/-   ##
==========================================
- Coverage   88.55%   88.50%   -0.05%     
==========================================
  Files         703      703              
  Lines      208259   208260       +1     
  Branches    40162    40151      -11     
==========================================
- Hits       184415   184317      -98     
- Misses      15844    15955     +111     
+ Partials     8000     7988      -12     

Files with missing lines	Coverage Δ
lib/internal/util/debuglog.js	89.51% <100.00%> (-5.80%)	⬇️

... and 50 files with indirect coverage changes

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[aduh95]

For some reason I don't see the same error locally, anyway I guess it's still too soon for that. We'll need https://chromium-review.googlesource.com/c/v8/v8/+/7265453 to land first