quic: validate :path in sendHeaders

[Archkon]

Fixes: #64924

[nodejs-github-bot]

Review requested:

• @nodejs/quic

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.33%. Comparing base (a876a12) to head (7360e6a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #64936   +/-   ##
=======================================
  Coverage   90.32%   90.33%           
=======================================
  Files         759      759           
  Lines      248325   248325           
  Branches    46861    46867    +6     
=======================================
+ Hits       224303   224313   +10     
+ Misses      15467    15452   -15     
- Partials     8555     8560    +5     

see 20 files with indirect coverage changes

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[jasnell]

@Archkon ... yes, http-specific validation belongs in the http-specific application.

[jasnell]

/cc @nodejs/quic for reviews