Reverts flutter/flutter#142825

Initiated by: zanderso

Reason for reverting: Analysis failure closing the engine tree https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8756815302197889649/+/u/Framework_analyze/Framework_analyze/stdout?format=raw

Original PR Author: TahaTesser

Reviewed By: {HansMuller}

This change reverts the following previous change:
Original Description:
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)