Reap still running threads after timeout

This is an improvement to #49921 which reaps threads after the timeout
expires instead of letting them continue to take up resources.

lib/ansible/module_utils/facts/timeout.py

@@ -50,6 +50,8 @@ def timeout(seconds=None, error_message="Timer expired"):
             except multiprocessing.TimeoutError:
                 # This is an ansible.module_utils.common.facts.timeout.TimeoutError
                 raise TimeoutError('Timer expired after %s seconds' % timeout_value)
+            finally:
+                pool.terminate()
 
         return wrapper