Consider overwriting evict

## 🏗 Enhancement Proposal

Spent a good amount of time trying to debug why an updated image on the backend for the same URL still showed the previous image even when evicting and destroying the object.

Only found out i had to use `CachedNetworkImage.evictFromCache(url)` by stumbling upon [this issue](https://github.com/Baseflow/flutter_cached_network_image/issues/390).

### Pitch
Would it make sense to have this as default behaviour with something like:
```dart
// inside cached_network_image_provider.dart

@override
Future evict({ImageCache? cache, ImageConfiguration configuration = ImageConfiguration.empty}) async {
await CachedNetworkImage.evictFromCache(url);
return super.evict(cache: cache, configuration: configuration);
}
```

### Platforms affected (mark all that apply)
- MacOS
- Probably others