[BUG] VertexAI doesn't automatically retry as intended

Users get this error:

```
the service reports an error with code RESOURCE_EXHAUSTED described as: Quota exceeded for aiplatform.googleapis.com/embed_content_input_tokens_per_minute_per_base_model with base model: gemini-embedding. Please submit a quota increase request. https://cloud.google.com/vertex-ai/docs/generative-ai/quotas-genai.
```