[nrf fromtree] tests: bluetooth: tester: add nrf54h20 configs

Added:
nrf54h20dk_nrf54h20_cpuapp.overlay: Choose uart136 hwfc 115200
nrf54h20dk_nrf54h20_cpuapp.conf

Signed-off-by: Aytürk Düzen <ayturk.duzen@nordicsemi.no>
(cherry picked from commit 5f00c18)

tests/bluetooth/tester/boards/nrf54h20dk_nrf54h20_cpuapp.conf

@@ -0,0 +1,23 @@
+# CONFIG_TEST enforces minimal logging, which we don't want
+CONFIG_TEST=n
+
+CONFIG_ASSERT=y
+# Enable the option below to measure stack usage
+#CONFIG_INIT_STACKS=y
+CONFIG_THREAD_NAME=y
+CONFIG_HW_STACK_PROTECTION=y
+
+CONFIG_LOG=y
+CONFIG_LOG_BUFFER_SIZE=4096
+CONFIG_RTT_CONSOLE=y
+CONFIG_LOG_BACKEND_RTT=y
+CONFIG_LOG_BACKEND_RTT_MODE_DROP=y
+CONFIG_USE_SEGGER_RTT=y
+CONFIG_SEGGER_RTT_BUFFER_SIZE_UP=4096
+CONFIG_LOG_BACKEND_SHOW_COLOR=n
+CONFIG_LOG_PROCESS_THREAD_STACK_SIZE=1024
+
+CONFIG_LOG_DEFAULT_LEVEL=3
+CONFIG_BTTESTER_LOG_LEVEL_DBG=y
+
+CONFIG_UART_INTERRUPT_DRIVEN=y

tests/bluetooth/tester/boards/nrf54h20dk_nrf54h20_cpuapp.overlay

@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/ {
+	chosen {
+		zephyr,uart-pipe = &uart136;
+	};
+};
+
+&uart136 {
+	compatible = "nordic,nrf-uarte";
+	current-speed = <115200>;
+	status = "okay";
+	hw-flow-control;
+};