Use livekit's Rust SDK instead of their swift SDK

[maxbrunsfeld]

See livekit/rust-sdks#355

Todo:

• make call / live_kit_client crates use the livekit rust sdk
• create a fake version of livekit rust API for integration tests
• capture local audio
• play remote audio
• capture local video tracks
• play remote video tracks
• bugs
  • deafening does not work (Can't stop a remote audio track from playing with RtcAudioTrack::set_enabled(false) livekit/rust-sdks#359)
  • mute and speaking status are not replicated properly: (Not receiving TrackMuted or ActiveSpeakersChanged events livekit/rust-sdks#358)
  • linux - crash due to symbol conflict between WebRTC's BoringSSL and libcurl's openssl (libwebrtc-sys conflicting with openssl-sys livekit/rust-sdks#89)
  • linux - libwebrtc-sys adds undesired dependencies on libGL and libXext
  • windows - linker error, maybe related to the C++ stdlib

    libwebrtc_sys-54978c6ad5066a35.rlib(video_frame.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MT_StaticRelease' doesn't match value 'MD_DynamicRelease' in libtree_sitter_yaml-df6b0adf8f009e8f.rlib(2e40c9e35e9506f4-scanner.o)
    

Release Notes:

• N/A