test: update WPT expectations

[mcollina]

This relates to...

N/A

Rationale

Keep Undici's expected Web Platform Test results synchronized with the currently pinned WPT checkout.

Changes

• Refresh Fetch and WebSocket WPT expectations.
• Record newly discovered and removed upstream test cases.
• Update expected file- and case-level outcomes.

Features

N/A

Bug Fixes

N/A

Breaking Changes and Deprecations

N/A

Status

• I have read and agreed to the Developer's Certificate of Origin
• Tested
• Benchmarked (optional)
• Documented
• Review ready
• In review
• Merge ready

Testing:

• npm run test:wpt
• npm run lint

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.47%. Comparing base (10d93fc) to head (06ed69c).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5587      +/-   ##
==========================================
- Coverage   93.47%   93.47%   -0.01%     
==========================================
  Files         110      110              
  Lines       37665    37670       +5     
==========================================
+ Hits        35208    35212       +4     
- Misses       2457     2458       +1     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 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.