vfs: validate ZipProvider parent directories

[trivikr]

Fixes: #65828

Reject attempts to create archive entries beneath non-directory parents. Cover open, mkdir, and rename in the sync and async APIs.

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Assisted-by: codex

[codecov]

Codecov Report

❌ Patch coverage is 91.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.19%. Comparing base (b265340) to head (4a1f731).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/internal/vfs/providers/ziparchive.js	91.66%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #65829   +/-   ##
=======================================
  Coverage   90.18%   90.19%           
=======================================
  Files         770      770           
  Lines      264410   264434   +24     
  Branches    50230    50252   +22     
=======================================
+ Hits       238449   238495   +46     
+ Misses      16966    16928   -38     
- Partials     8995     9011   +16     

Files with missing lines	Coverage Δ
lib/internal/vfs/providers/ziparchive.js	97.68% <91.66%> (-0.25%)	⬇️

... and 28 files with indirect coverage changes

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