gh-117531: Unblock getters after non-immediate queue shutdown

Lib/queue.py

@@ -253,6 +253,7 @@ def shutdown(self, immediate=False):
                 # release all blocked threads in `join()`
                 self.all_tasks_done.notify_all()
             self.not_empty.notify_all()
+            # All getters need to re-check queue-empty to raise ShutDown
             self.not_full.notify_all()
 
     # Override these methods to implement other queue organizations