Use a file-like obj for stdout/stderr for deadlock workaround (#74156)

Fixes #74149

changelogs/fragments/fix-for-workerprocess-stdout-deadlock-fix.yml

@@ -0,0 +1,2 @@
+bugfixes:
+ - "WorkerProcess - Python 3.5 fix for workaround for stdout deadlock in multiprocessing shutdown to avoid process hangs. (https://github.com/ansible/ansible/issues/74149)"

lib/ansible/executor/process/worker.py

@@ -145,8 +145,7 @@ class WorkerProcess(multiprocessing_context.Process):
             # TODO: Evaluate overhauling ``Display`` to not write directly to stdout
             # and evaluate migrating away from the ``fork`` multiprocessing start method.
             if sys.version_info[0] >= 3:
-                sys.stdout = os.devnull
-                sys.stderr = os.devnull
+                sys.stdout = sys.stderr = open(os.devnull, 'w')
 
     def _run(self):
         '''