[Free Threading] test_external_inspection: flaky "[WinError 299] Only part of a ReadProcessMemory or WriteProcessMemory request was completed" error on GHA Windows CI #158574

FAIL: test_tlbc_cache_refresh_after_growth (test.test_external_inspection.TestGetStackTrace.test_tlbc_cache_refresh_after_growth)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\a\cpython\cpython\Lib\test\test_external_inspection.py", line 2384, in test_tlbc_cache_refresh_after_growth
    self.assertEqual(
    ~~~~~~~~~~~~~~~~^
        result.returncode, 0,
        ^^^^^^^^^^^^^^^^^^^^^
        f"stdout: {result.stdout}\nstderr: {result.stderr}",
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
AssertionError: 1 != 0 : stdout: 
stderr: OSError: [WinError 299] Only part of a ReadProcessMemory or WriteProcessMemory request was completed

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<string>", line 38, in <module>
    wait_for_leaf_frames(u, 2)
    ~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "<string>", line 17, in wait_for_leaf_frames
    traces = u.get_stack_trace()
OSError: ReadProcessMemory failed for PID 2764 at address 0x1 (size 80, partial read 0 bytes): Windows error 299