Exclude this Khepri-specific test from mixed version cluster runs

(cherry picked from commit 6b444ae)
(cherry picked from commit 2183140)

Author: michaelklishin

deps/rabbit/src/rabbit_upgrade_preparation.erl

@@ -109,6 +109,6 @@ list_with_minimum_quorum_for_cli() ->
     [#{
            <<"readable_name">> => C,
            <<"name">> => C,
-           <<"virtual_host">> => "-",
+           <<"virtual_host">> => <<"(not applicable)">>,
            <<"type">> => process
       } || C <- endangered_critical_components()].

deps/rabbit/test/upgrade_preparation_SUITE.erl

@@ -56,9 +56,15 @@ end_per_group(_Group, Config) ->
               rabbit_ct_broker_helpers:teardown_steps()).
 
 
-init_per_testcase(TestCase, Config) ->
-    rabbit_ct_helpers:testcase_started(Config, TestCase),
-    Config.
+init_per_testcase(Testcase, Config) when Testcase == await_quorum_plus_one_rabbitmq_metadata ->
+    case rabbit_ct_helpers:is_mixed_versions() of
+        true ->
+            {skip, "not mixed versions compatible"};
+        _ ->
+            rabbit_ct_helpers:testcase_started(Config, Testcase)
+    end;
+init_per_testcase(Testcase, Config) ->
+    rabbit_ct_helpers:testcase_started(Config, Testcase).
 
 end_per_testcase(TestCase, Config) ->
     rabbit_ct_helpers:testcase_finished(Config, TestCase).