Skip testing AWS-compatible templates and resources

these are barely used and barely working.
The rest of OpenStack has mostly removed AWS-compatible APIs at this
point.
Supporting and testing these is an unnecessary burden.

Closes-Issue: PRODX-40453
Change-Id: I98fd7c4cc66bb6a529d1ac81ed70e307cc510071
diff --git a/heat_tempest_plugin/tests/scenario/test_server_cfn_init.py b/heat_tempest_plugin/tests/scenario/test_server_cfn_init.py
index 817e8c6..5b4c562 100644
--- a/heat_tempest_plugin/tests/scenario/test_server_cfn_init.py
+++ b/heat_tempest_plugin/tests/scenario/test_server_cfn_init.py
@@ -11,6 +11,7 @@
 #    under the License.
 
 import json
+import unittest
 
 from tempest.lib import decorators
 
@@ -18,6 +19,7 @@
 from heat_tempest_plugin.tests.scenario import scenario_base
 
 
+@unittest.skip("testing of CFN-compatible resources is disabled")
 class CfnInitIntegrationTest(scenario_base.ScenarioTestsBase):
     """Testing cfn-init and cfn-signal workability."""