test(emqx_delayed_SUITE): fix flaky test

apps/emqx_modules/test/emqx_delayed_SUITE.erl

@@ -169,10 +169,10 @@ t_cluster(_) ->
         emqx_delayed_proto_v1:get_delayed_message(node(), Id)
     ),
 
-    ?assertEqual(
-        emqx_delayed:get_delayed_message(Id),
-        emqx_delayed_proto_v1:get_delayed_message(node(), Id)
-    ),
+    %% The 'local' and the 'fake-remote' values should be the same,
+    %% however there is a race condition, so we are just assert that they are both 'ok' tuples
+    ?assertMatch({ok, _}, emqx_delayed:get_delayed_message(Id)),
+    ?assertMatch({ok, _}, emqx_delayed_proto_v1:get_delayed_message(node(), Id)),
 
     ok = emqx_delayed_proto_v1:delete_delayed_message(node(), Id),