Don't delete the stream from state if requestID doesn't match

[mjh1]

There is a bug where a previous pipeline of the same streamID can cause a more recent pipeline to fail.

Example logs showing the bug:

I0707 15:07:46.616171       1 ai_mediaserver.go:1097] request_id=be334f7e stream=stk_zrpiNFnPaXHVmcwy source_type=livepeer-whip stream_id=str_1MGM13e5t1QguMwv model_id=comfyui manifest_id=8e5a0beb url=https://cal-2.lvpr.io:20006/ai/trickle/8e5a0beb-out Live video pipeline finished
....
I0707 15:07:53.241637       ai_live_video.go:258] request_id=337983a7 stream=stk_zrpiNFnPaXHVmcwy source_type=livepeer-whip stream_id=str_1MGM13e5t1QguMwv model_id=comfyui manifest_id=b7cebeb6 url=https://cal-2.lvpr.io:20006/ai/trickle/b7cebeb6-out trickle subscribe stopping, input stream does not exist.

RequestID 337983a7 had recently started up but the trickle subscribe stopped due to this input stream check, this was because a previous stream with requestID be334f7e was shutting down and removed the stream in this cleanupControl function.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 31.70613%. Comparing base (9717ba2) to head (569ec37).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
server/ai_mediaserver.go	0.00000%	2 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##              master       #3667   +/-   ##
=============================================
  Coverage   31.70613%   31.70613%           
=============================================
  Files            156         156           
  Lines          47259       47259           
=============================================
  Hits           14984       14984           
  Misses         31393       31393           
  Partials         882         882           

Files with missing lines	Coverage Δ
server/ai_mediaserver.go	4.65808% <0.00000%> (ø)

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Files with missing lines	Coverage Δ
server/ai_mediaserver.go	4.65808% <0.00000%> (ø)

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[j0sh]

Good catch, thanks!