This change is because having the standard optional dependencies installed by default was being inconvenient to several users, and having to install instead `fastapi-slim` was not being a feasible solution.

Discussed here: [#11522](https://github.com/fastapi/fastapi/pull/11522) and here: [#11525](https://github.com/fastapi/fastapi/discussions/11525)

### Docs

        *   Dynamic shapes are supported for generators by calling the Model on
            the first batch we "peek" from the generator. This used to happen
            implicitly in `Model._standardize_user_data`. Long-term, a solution
            where the `DataAdapter` doesn't need to call the Model is probably
            preferable.
    *   The SavedModel format now supports all Keras built-in layers (including