BigQuery now supports the gemini-3.1-flash-lite and gemini-3.5-flash GA

## Feature Feature BigQuery now supports the `gemini-3.1-flash-lite` and `gemini-3.5-flash` GA models, which are available for the `us`, `eu`, and `global` multi-regional endpoints. For information about how to specify a multi-regional endpoint and how endpoints are selected, read about[locations](https://cloud.google.com/bigquery/docs/generative-ai-overview#locations)in the generative AI overview.