test_free_threading: test_instrumentation() failing randomly on free-threading CI

[kumaraditya303]

FAIL: test_instrumentation (test.test_free_threading.test_monitoring.SetTraceMultiThreaded.test_instrumentation)
----------------------------------------------------------------------
Traceback (most recent call last):
 File "D:\a\cpython\cpython\Lib\test\test_free_threading\test_monitoring.py", line 75, in test_instrumentation
 self.after_test()
 ~~~~~~~~~~~~~~~^^
 File "D:\a\cpython\cpython\Lib\test\test_free_threading\test_monitoring.py", line 152, in after_test
 self.assertTrue(self.called)
 ~~~~~~~~~~~~~~~^^^^^^^^^^^^^
AssertionError: False is not true
----------------------------------------------------------------------
Ran 53 tests in 55.959s
FAILED (failures=1)
test test_free_threading failed

https://github.com/python/cpython/actions/runs/13032099559/job/36353586624?pr=128869

Linked PRs

• gh-129441: Fix some flakiness in test_instrumentation #141881
• [3.14] gh-129441: Fix some flakiness in test_instrumentation (gh-141881) #141913
• [3.13] gh-129441: Fix some flakiness in test_instrumentation (gh-141881) #141914

[colesbury]

cc @DinoV