chore: disable proto validation by the generator (#617)

* chore: disable proto validation by the generator

The generator Docker image will start supporting this option soon.

The command line will be: `..... --validation false .....`

* update gax dependency

* rerun sample test

Co-authored-by: xiaozhenliugg <xiaozhenliu@google.com>

Author: alexander-fenster

packages/google-cloud-dialogflow/package.json

@@ -43,7 +43,7 @@
     "precompile": "gts clean"
   },
   "dependencies": {
-    "google-gax": "^2.3.1",
+    "google-gax": "^2.4.1",
     "protobufjs": "^6.8.9"
   },
   "devDependencies": {

packages/google-cloud-dialogflow/synth.py

@@ -30,8 +30,9 @@
         generator_args={
             "grpc-service-config": f"google/cloud/dialogflow/{version}/dialogflow_grpc_service_config.json",
             "package-name": f"@google-cloud/dialogflow",
-            "main-service": f"dialogflow"
-            },
+            "main-service": f"dialogflow",
+            "validation": "false",
+        },
         proto_path=f'/google/cloud/dialogflow/{version}',
         extra_proto_files=["google/cloud/common_resources.proto"]
         )