bpo-31516: Skip test_main_thread_during_shutdown() with COUNT_ALLOCS builds. (GH-8052)

diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index db70dfa..8160a5a 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -546,6 +546,7 @@
         self.assertEqual(err, b"")
         self.assertEqual(data, "Thread-1\nTrue\nTrue\n")
 
+    @requires_type_collecting
     def test_main_thread_during_shutdown(self):
         # bpo-31516: current_thread() should still point to the main thread
         # at shutdown