gh-145587: fix busy loop in multiprocessing.connection.wait on Windows

Ensure wait() blocks for the specified timeout when object_list is empty, preventing 100% CPU usage. This aligns the Windows behavior with the Unix implementation.

Author: Shrey-N

Lib/multiprocessing/connection.py

@@ -1085,6 +1085,14 @@ def wait(object_list, timeout=None):
 
         Returns list of those objects in object_list which are ready/readable.
         '''
+        if not object_list:
+            if timeout is None:
+                while True:
+                    time.sleep(1e6)
+            elif timeout > 0:
+                time.sleep(timeout)
+            return []
+
         if timeout is None:
             timeout = INFINITE
         elif timeout < 0: