app: Add ETB trace overlay

Add overlay file with required ETB trace configurations.

Signed-off-by: Jan Tore Guggedal <[email protected]>

app/overlay-etb.conf

@@ -0,0 +1,13 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# ETB tracing
+CONFIG_ETB_TRACE=y
+CONFIG_ETB_TRACE_LOW_POWER=y
+CONFIG_MEMFAULT_NCS_ETB_CAPTURE=y
+# Reduce logging to avoid filling up ETB with data not related to the crash
+CONFIG_FAULT_DUMP=0
+CONFIG_KERNEL_LOG_LEVEL_OFF=y