[py] improve socket resource management with proper shutdown sequence (#15453)

fix: add socket.shutdown() before close() to ensure timely closing

Co-authored-by: Corey Goldberg <[email protected]>

Author: allrob23

py/selenium/webdriver/common/utils.py

@@ -104,6 +104,10 @@ def is_connectable(port: int, host: Optional[str] = "localhost") -> bool:
         result = False
     finally:
         if socket_:
+            try:
+                socket_.shutdown(socket.SHUT_RDWR)
+            except:
+                pass
             socket_.close()
     return result