feat: add a simple test to generate a EL3 panic

Add a simple patch which would generate a el3 panic from bl31_main
Cleanup and use crash-report tf-a config for bl31_main panic scenario.

Change-Id: Id9870210f3aef0886cd82e7ae5e0e14e82167367
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/expect/bl31_boot.exp b/expect/bl31_boot.exp
new file mode 100644
index 0000000..aee2077
--- /dev/null
+++ b/expect/bl31_boot.exp
@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2023 Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# Expect script for Trusted Firmware Test Framework
+#
+
+source [file join [file dirname [info script]] handle-arguments.inc]
+
+source [file join [file dirname [info script]] trusted-firmware.inc]