Move kasp migration tests to different directory

The kasp system test was getting pretty large, and more tests are on
the way. Time to split up. Move tests that are related to migrating
to dnssec-policy to a separate directory 'keymgr2kasp'.

(cherry picked from commit 5389172111)

bin/tests/system/keymgr2kasp/setup.sh

@@ -0,0 +1,32 @@
+#!/bin/sh -e
+#
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, you can obtain one at https://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+
+# shellcheck source=conf.sh
+. ../conf.sh
+
+set -e
+
+$SHELL clean.sh
+
+copy_setports ns3/named.conf.in ns3/named.conf
+copy_setports ns4/named.conf.in ns4/named.conf
+
+copy_setports ns3/kasp.conf.in ns3/kasp.conf
+
+# Setup zones
+(
+	cd ns3
+	$SHELL setup.sh
+)
+(
+	cd ns4
+	$SHELL setup.sh
+)