RSDK-9756-draft

[nicksanford]

This PR attempts to allow a module to stream a webrtc video track from viam-server's StreamServer.

Currently it doesn't work as the GRPC client a module has for communicating with viam-server goes over unix socket, as opposed to WebRTC.

As a result, the viam-server stream server is unable to add a webrtc track b/c the GRPC communication is happening over unix socket, not webrtc.

Logs:

\_ 2025-01-23T18:16:27.761Z	DEBUG	networking.module-connection.camera-1	camera/client.go:480	SubscribeRTP AddStream hit error	{"subID":"3ab2035e-3c1d-40c6-8350-f20dcd3a0e9c","trackName":"rdk:component:camera/camera-1","err":"rpc error: code = Unknown desc = can only add a stream over a WebRTC based connection"}
2025-01-23T18:16:27.761Z	INFO	rdk.modmanager.local-module-2.local-module-2.StdOut	pexec/managed_process.go:294	
\_ 2025-01-23T18:16:27.761Z	DEBUG	networking.module-connection.camera-1	camera/client.go:436	SubscribeRTP after	{"subID":"3ab2035e-3c1d-40c6-8350-f20dcd3a0e9c","name":"rdk:component:camera/camera-1","bufAndCBByID":"len: 0"}
2025-01-23T18:16:27.761Z	INFO	rdk.modmanager.local-module-2.local-module-2.StdOut	pexec/managed_process.go:294	
\_ 2025-01-23T18:16:27.761Z	DEBUG	networking.module-connection.camera-1	camera/client.go:408	Error subscribing to RTP. Closing passthrough buffer.
2025-01-23T18:16:27.763Z	INFO	rdk:component:camera/camera-2	passthroughcam/passthroughcam.go:76	SubscribeRTP STOP	{"log_ts":"2025-01-23T18:16:27.761Z"}
2025-01-23T18:16:27.763Z	DEBUG	rdk.modmanager	camera/client.go:480	SubscribeRTP AddStream hit error	{"subID":"11d91e54-1bdb-4607-a3f4-152e2f0ea91e","trackName":"rdk:component:camera/camera-2","err":"rpc error: code = Unknown desc = error setting up stream subscription: rpc error: code = Unknown desc = can only add a stream over a WebRTC based connection"}
2025-01-23T18:16:27.764Z	DEBUG	rdk.modmanager	camera/client.go:436	SubscribeRTP after	{"subID":"11d91e54-1bdb-4607-a3f4-152e2f0ea91e","name":"rdk:component:camera/camera-2","bufAndCBByID":"len: 0"}
2025-01-23T18:16:27.764Z	DEBUG	rdk.modmanager	camera/client.go:408	Error subscribing to RTP. Closing passthrough buffer.
2025-01-23T18:16:27.764Z	WARN	rdk.camera-2	state/state.go:296	tick: rtp_passthrough not possible, falling back to GoStream	{"err":"SubscribeRTP failed: rpc error: code = Unknown desc = error setting up stream subscription: rpc error: code = Unknown desc = can only add a stream over a WebRTC based connection"}

``2025-01-23T18:16:27.764Z WARN rdk.camera-2 state/state.go:296 tick: rtp_passthrough not possible, falling back to GoStream {"err":"SubscribeRTP failed: rpc error: code = Unknown desc = error setting up stream subscription: rpc error: code = Unknown desc = can only add a stream over a WebRTC based connection"}`