wpt: add remaining fetch/api/basic tests

[KhafraDev]

Fixes a few bugs and changes some things.

• Fetching about:blank now throws an error. Even though it's in the spec, no other platform supports fetching about:blank.
• Serializes request/response's url getter.
• Fixes an issue in the url serializer.
• Fixes an issue in the integrity handler where it would pick weaker hashing algorithms when there was a stronger one present.
• Fixes an issue where the integrity match regex was too strict.

Also undici now passes over 1,000 fetch WPTs

[codecov-commenter]

Codecov Report

Base: 94.19% // Head: 94.24% // Increases project coverage by +0.05% 🎉

Coverage data is based on head (b730ce3) compared to base (3bda21f).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1708      +/-   ##
==========================================
+ Coverage   94.19%   94.24%   +0.05%     
==========================================
  Files          53       53              
  Lines        4957     4955       -2     
==========================================
+ Hits         4669     4670       +1     
+ Misses        288      285       -3     

Impacted Files	Coverage Δ
lib/fetch/dataURL.js	88.67% <100.00%> (+0.62%)	⬆️
lib/fetch/index.js	83.23% <100.00%> (-0.13%)	⬇️
lib/fetch/request.js	84.82% <100.00%> (+0.05%)	⬆️
lib/fetch/response.js	95.58% <100.00%> (+1.07%)	⬆️
lib/fetch/util.js	85.30% <100.00%> (+0.14%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.