watch: check parent and child path properly

[jazelly]

Fixes: #57422

[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.22%. Comparing base (59f00d7) to head (7a81702).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/internal/watch_mode/files_watcher.js	90.90%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #57425   +/-   ##
=======================================
  Coverage   90.21%   90.22%           
=======================================
  Files         629      629           
  Lines      185126   185142   +16     
  Branches    36225    36232    +7     
=======================================
+ Hits       167016   167044   +28     
+ Misses      11055    11048    -7     
+ Partials     7055     7050    -5     

Files with missing lines	Coverage Δ
lib/internal/watch_mode/files_watcher.js	89.20% <90.90%> (-0.07%)	⬇️

... and 23 files with indirect coverage changes

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