[nrf noup] fixup! tests: bluetooth: tester: sysbuild configurable 53/54H

Add support for sysbuild 54h20 building
added nrf54h20 cpurad configuration to hci_ipc sample.

Signed-off-by: Aytürk Düzen <[email protected]>
Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>
(cherry picked from commit d2f19a2)

Author: AyturkDuzen

tests/bluetooth/tester/sysbuild.cmake

@@ -12,10 +12,6 @@ if(SB_CONFIG_NET_CORE_IMAGE_HCI_IPC)
 	)
 
 	if(SB_CONFIG_SOC_NRF5340_CPUAPP)
-		set(${NET_APP}_CONF_FILE
-		${NET_APP_SRC_DIR}/nrf5340_cpunet_iso-bt_ll_sw_split.conf
-		CACHE INTERNAL ""
-		)
 		set(${NET_APP}_SNIPPET
 		"bt-ll-sw-split"
 		CACHE INTERNAL ""