Add timeout in load shim v2

add timeout in connect shim v2 avoid starting containerd hang

Signed-off-by: Ace-Tang <aceapril@126.com>

runtime/v2/shim.go

@@ -100,6 +100,8 @@ func loadShim(ctx context.Context, bundle *Bundle, events *exchange.Exchange, rt
 		events:  events,
 		rtTasks: rt,
 	}
+	ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
 	if err := s.Connect(ctx); err != nil {
 		return nil, err
 	}