Support "Grounding with Google Search" in Google provider

[wong2]

Feature Description

The Gemini API has a new feature where you can ground results with Google search which reduces hallucinations and provides references to content:
https://ai.google.dev/gemini-api/docs/grounding

[adolphnov]

I have tried vertex is valid, it will report an error in Google AI Studio, which does not support this parameter. And note that when used in the vertex, no tools can be included, otherwise an error will also be reported.
I hope this is helpful to you.