Bluetooth: BAP: Fix issue with pa sync and ID in broadcast_sink_create

The broadcast_id and the pa_sync fields should be set before calling
broadcast_sink_add_src as broadcast_sink_add_src will those values to
compare against other receive states.

The function was also missing a call to broadcast_sink_cleanup
for the newly allocated sink in case there was an error.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>