footprint: Add bt_hci_rpmsg with ISO for the nRF5340 netcore
footprint: Add bt_hci_rpmsg with ISO for the nRF5340 netcore

Add footprint tracking of the samples/bluetooth/hci_rpmsg
sample for the nRF5340 with ISO broadcast and ISO receive respectively.

Signed-off-by: Emil Gydesen <a20314356615223738233ab4c4eb1cd8cd4146fa@nordicsemi.no>

finikorg/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr