ai/live: updates to WHIP endpoint for stream creation

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What does this pull request do? Explain your changes. (required)

Updates the Gateway WHIP endpoint to setup stream similar to post request from MediaMTX.

Fixes bug in Location url to remove additional /

Question:

Should this always be behind the live ai auth webhook? If yes, is there any docs on how the auth webhook should be structured and what is returned?

Specific updates (required)

• Fix Location url returned in header by removing extra / before URL path after port
• add parsing query string to WHIP endpoint on gateway similar to StartLiveVideo

How did you test each of these updates (required)

Built and tested locally

Does this pull request close any open issues?

Checklist:

• Read the contribution guide
• make runs successfully
• All tests in ./test.sh pass
• README and other documentation updated
• Pending changelog updated

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 31.70696%. Comparing base (45188b5) to head (87b95e8).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
server/ai_mediaserver.go	0.00000%	10 Missing ⚠️
media/whip_server.go	0.00000%	1 Missing ⚠️

Additional details and impacted files

@@                 Coverage Diff                 @@
##              master       #3673         +/-   ##
===================================================
- Coverage   31.71877%   31.70696%   -0.01181%     
===================================================
  Files            156         156                 
  Lines          47278       47283          +5     
===================================================
- Hits           14996       14992          -4     
- Misses         31398       31406          +8     
- Partials         884         885          +1     

Files with missing lines	Coverage Δ
media/whip_server.go	0.00000% <0.00000%> (ø)
server/ai_mediaserver.go	4.63054% <0.00000%> (-0.02293%)	⬇️

... and 1 file with indirect coverage changes

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Files with missing lines	Coverage Δ
media/whip_server.go	0.00000% <0.00000%> (ø)
server/ai_mediaserver.go	4.63054% <0.00000%> (-0.02293%)	⬇️

... and 1 file with indirect coverage changes

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