Allow filtering local IPs by candidate type

[JoTurk]

Description

#899 made it so IP filter works for stun and turn, which is the correct thing to do for privacy reasons and control, this change caused an issue for snowflake: #899 (comment) for v5, I propose we change the IP filter parameter from a string IP to a struct so user can filter by the candidate type or any other info we add in the future (we can add interfaces!).

Change WithIPFilter to accept IPFilterInfo containing local IP and candidate type.

[codecov]

Codecov Report

❌ Patch coverage is 91.66667% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.07%. Comparing base (1925aac) to head (bb1e43c).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
gather.go	88.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1017      +/-   ##
==========================================
+ Coverage   91.90%   92.07%   +0.16%     
==========================================
  Files          46       46              
  Lines        5510     5536      +26     
==========================================
+ Hits         5064     5097      +33     
+ Misses        446      439       -7     

Flag	Coverage Δ
go	92.07% <91.66%> (+0.16%)	⬆️

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[sirzooro]

Changes looks good, just update that comment.

Side note from AI review: raddr/rport in candidates still reveal internal address/port, what is not desirable for applications which hide host candidates for privacy reason. This would deserve separate PR.

[JoTurk]

@sirzooro thank you for the review, I'll add an example comment before I merge.

raddr/rport in candidates still reveal internal address/port,

users can filter ICE extensions, we can make it more clear.

[JoTurk]

Also this comment reminded me that we need to fix how we serialize extension from and to webrtc. it's currently kinda bad because I couldn't break the webrtc or ICE API when i added the parser.