permission: keep explicit fs grants when dropping a covering directory

[RafaelGSS]

permission: keep explicit fs grants when dropping a covering directory

[nodejs-github-bot]

Review requested:

• @nodejs/security-wg

[codecov]

Codecov Report

❌ Patch coverage is 93.75000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 90.41%. Comparing base (fcfb7ec) to head (d830a67).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/permission/fs_permission.cc	93.75%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #66556   +/-   ##
=======================================
  Coverage   90.40%   90.41%           
=======================================
  Files         791      791           
  Lines      276226   276234    +8     
  Branches    53045    53046    +1     
=======================================
+ Hits       249732   249755   +23     
+ Misses      16899    16890    -9     
+ Partials     9595     9589    -6     

Files with missing lines	Coverage Δ
src/permission/fs_permission.cc	76.66% <93.75%> (+7.35%)	⬆️

... and 33 files with indirect coverage changes

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