Add a system test to check catalog zones with non-IN rdata class fail

According to DNS catalog zones draft version 5 document, the CLASS field
of every RR in a catalog zone MUST be IN.

Add a new check in the catz system test to verify that a non-IN class
catalog zone (in this case CH) fails to load.

BIND does not support having a non-IN class RR in an IN class zone, or
non-IN class zone in an IN class view, so to verify that BIND respects
the mentioned restriction we must try to add a non-IN class catalog
zone and check that it didn't succeed.

The `named` configuration files had to be restructured to put all the
zones inside views, which also resulted in some corresponding changes
in the tests.sh script.

bin/tests/system/catz/ns1/catalog-bad5.example.db

@@ -0,0 +1,14 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; 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.
+
+@ 3600 SOA . . 1 86400 3600 86400 3600
+@ 3600 CH NS invalid.
+version CH TXT "2"