permission: block FileHandle fsync and fdatasync

[RafaelGSS]

With the Permission Model enabled, the top-level fs.fsync() and fs.fdatasync() APIs are disabled because operations on already-open file descriptors cannot be tied to path grants, but the equivalent FileHandle methods remained available. Disable FileHandle.sync() and FileHandle.datasync() for consistency and document the behavior.

[nodejs-github-bot]

Review requested:

• @nodejs/security-wg

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.12%. Comparing base (e7904d4) to head (36a4f47).
⚠️ Report is 356 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #65431      +/-   ##
==========================================
- Coverage   90.14%   90.12%   -0.03%     
==========================================
  Files         746      752       +6     
  Lines      242764   252327    +9563     
  Branches    45739    47469    +1730     
==========================================
+ Hits       218848   227399    +8551     
- Misses      15426    16221     +795     
- Partials     8490     8707     +217     

Files with missing lines	Coverage Δ
lib/internal/fs/promises.js	92.28% <100.00%> (-0.73%)	⬇️

... and 254 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.

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/76068/