[3.13] gh-124402: Require cpu resource in test_super slow method (GH-124434) (#124468)

gh-124402: Require cpu resource in test_super slow method (GH-124434)

test___class___modification_multithreaded() now requires the 'cpu'
test resource on a Free Threaded build.
(cherry picked from commit 5a60566074)

Co-authored-by: Victor Stinner <vstinner@python.org>

Lib/test/test_super.py

@@ -4,6 +4,7 @@
 import threading
 import unittest
 from unittest.mock import patch
+from test import support
 from test.support import import_helper, threading_helper
 
 
@@ -513,6 +514,11 @@ def test___class___modification_multithreaded(self):
         This should be the case anyways as our test suite sets
         an audit hook.
         """
+
+        if support.Py_GIL_DISABLED:
+            # gh-124402: On a Free Threaded build, the test takes a few minutes
+            support.requires('cpu')
+
         class Foo:
             pass