webrtc: solve domains in webrtcAdditionalHosts on server-side (#4817)

[aler9]

Fixes #4817

[codecov]

Codecov Report

❌ Patch coverage is 73.91304% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.23%. Comparing base (b627128) to head (ae50c27).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/protocols/webrtc/peer_connection.go	73.91%	9 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4866      +/-   ##
==========================================
- Coverage   55.24%   55.23%   -0.01%     
==========================================
  Files         216      216              
  Lines       22823    22836      +13     
==========================================
+ Hits        12608    12614       +6     
- Misses       9268     9274       +6     
- Partials      947      948       +1     

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[github-actions]

This issue is mentioned in release v1.14.0 🚀
Check out the entire changelog by clicking here