dgram: support blocklist in udp

[theanarkh]

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

[nodejs-github-bot]

Review requested:

• @nodejs/net

[codecov]

Codecov Report

Attention: Patch coverage is 48.48485% with 17 lines in your changes missing coverage. Please review.

Project coverage is 87.99%. Comparing base (4cf6fab) to head (e00dee2).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/dgram.js	48.48%	14 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #56087      +/-   ##
==========================================
- Coverage   88.00%   87.99%   -0.01%     
==========================================
  Files         656      656              
  Lines      188988   189018      +30     
  Branches    35992    35994       +2     
==========================================
+ Hits       166315   166323       +8     
- Misses      15838    15851      +13     
- Partials     6835     6844       +9     

Files with missing lines	Coverage Δ
lib/dgram.js	96.15% <48.48%> (-1.19%)	⬇️

... and 30 files with indirect coverage changes