samples: Bluetooth: hci_uart hci_ipc configuration update

Updates to project configuration extras to build with
Zephyr Controller.

Configure for 2 broadcast audio sources in 2 groups,
2 unicast audio source in 1 group and, 2 audio sinks
for 1 group for both broadcast and unicast usecases.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>