DNM: Disable CRACEN ECC COUNTERMEASURES for testing

Skip using it until it is fixed.

Signed-off-by: Arkadiusz Balys <arkadiusz.balys@nordicsemi.no>

Author: ArekBalysNordic

samples/light_bulb/boards/nrf54lm20dk_nrf54lm20a_cpuapp.conf

@@ -0,0 +1,10 @@
+#
+# Copyright (c) 2026 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+
+# Fixme, the new ECC handling is broken, and let's disable the new feature for now for testing.
+# If cracen is fixed, we can enable this again.
+CONFIG_CRACEN_ECC_COUNTERMEASURES=n