fixes [`showSnackBar` is always replacing `animation` parameter of `SnackBar`](https://github.com/flutter/flutter/issues/141646)

### Code sample preview

![Screenshot 2024-02-02 at 21 10 57](https://github.com/flutter/flutter/assets/48603081/66d808f0-d638-4561-b9a4-96d1b93938f4)