psasim: update bash scripts

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/psa-client-server/psasim/test/kill_server.sh b/tests/psa-client-server/psasim/test/kill_server.sh
new file mode 100755
index 0000000..7aba5a3
--- /dev/null
+++ b/tests/psa-client-server/psasim/test/kill_server.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+
+set -e
+
+pkill psa_server || true
+
+# Remove temporary files and logs
+rm -f psa_notify_*
+rm -f psa_service_*
+rm -f psa_server.log
+
+# Remove all IPCs
+ipcs -q | awk '{ printf " -q " $2 }' | xargs ipcrm > /dev/null 2>&1 || true