Excessive exceptions in stack trace due to deprecated behavior, ray 2.35+

running the demo yields:

```raw
ray.serve.exceptions.RayServeException: `DeploymentResponse` is not serializable. If you are passing the `DeploymentResponse` in a nested object (e.g. a list or dictionary) to a downstream deployment handle call, that is no longer supported. Please only pass `DeploymentResponse` objects as top level arguments.
```