Port integration tests routes CLI to v2

Fix options signature

cmd/headscale/cli/routes.go

@@ -77,6 +77,12 @@ var listRoutesCmd = &cobra.Command{
 				return
 			}
 
+			if output != "" {
+				SuccessOutput(response.Routes, "", output)
+
+				return
+			}
+
 			routes = response.Routes
 		} else {
 			response, err := client.GetMachineRoutes(ctx, &v1.GetMachineRoutesRequest{
@@ -92,6 +98,12 @@ var listRoutesCmd = &cobra.Command{
 				return
 			}
 
+			if output != "" {
+				SuccessOutput(response.Routes, "", output)
+
+				return
+			}
+
 			routes = response.Routes
 		}