Implement Voice Broadcast recording (#9307)
* Implement VoiceBroadcastRecording
* Implement PR feedback
* Add voice broadcast recording stores
* Refactor startNewVoiceBroadcastRecording
* Refactor VoiceBroadcastRecordingsStore to VoiceBroadcastRecording
* Rename VoiceBroadcastRecording to VoiceBroadcastRecorder
* Return remaining chunk on stop
* Extract createVoiceMessageContent
* Implement recording
* Replace dev value with config
* Fix clientInformation-test
* Refactor VoiceBroadcastRecording
* Fix VoiceBroadcastRecording types
* Re-order getter
* Mark voice_broadcast config as optional
* Merge voice-broadcast modules
* Remove underscore props
* Add Optional types
* Add return types everywhere
* Remove test casts
* Add magic comments
* Trigger CI
* Switch VoiceBroadcastRecorder to TypedEventEmitter
* Trigger CI
* Add voice broadcast chunk event content
Co-authored-by: Travis Ralston <travisr@matrix.org>