Bluetooth: CAP: Add broadcast_code to reception start parameters

[Thalley]

Summary

The broadcast receptions start procedure (bt_cap_commander_broadcast_reception_start) should also support automatically providing the broadcast code, without having to do a separate bt_cap_commander_distribute_broadcast_code afterwards, to be more in line with how the procedures are defined by the CAP spec.

Describe the solution you'd like

Add a broadcast code parameter to bt_cap_commander_broadcast_reception_stop_param that, if set, also distributes the broadcast code to all receivers after the receive state has been added.

Additionally, this should also be added to bt_cap_unicast_to_broadcast_param

Alternatives

No response

Additional Context

No response