gh-117688: Fix deadlock in test_no_stale_references with GIL disabled #117720
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Check
my_object_collected.wait()
in a loop to give the main thread achance to merge the reference count fields. Additionally, call
my_object_collected.set()
in a background thread to avoid deadlockingwhen the destructor is called asynchronously via the eval breaker
within the body of of
my_object_collected.wait()
.ThreadPoolExecutorTest.test_no_stale_references
may hang with GIL disabled #117688