* ref(conference) Simplify track creation.
If gUM fails, we do not have to retry gUM with mic only and camera only constraints. gUM has come a long way and this is not needed anymore.

* ref(conference) Filter tracks that are added to conference.

* squash: Address review comments

* fix(prejoin): Display the exact gUM error in prejoin.

* squash: Address review comments

* fix(connection-status): remove unused participant connectionStatus.
Always use trackStreamingStatus now that legacy endpoint based signaling has been removed.

* remove the check for source-name signaling.
Default to source-name signaling always.

* Remove the check for multi-stream mode.
Make that the default mode and remove the support for legacy SS mode.

* Remove presenter mode.

* update latest@lib-jitsi-meet