Close To Specific ViewModel in Stack
## 🚀 Feature Requests

Imagine you have a view stack as follows.

A > B > C

The navigation service could have a close command that would lead to ViewModel A.

```
navigationService.CloseTo<A>(this);
```

### Contextualize the feature
This would be a modification of the navigation service and the platform view presenters.
I am requesting support for iOS and Android, but I imagine this would apply to the other platforms as well.

### Describe the feature

### Platforms affected (mark all that apply)
- [x] :iphone: iOS
- [x] :robot: Android
- [ ] :checkered_flag: WPF
- [ ] :earth_americas: UWP
- [ ] :apple: MacOS
- [ ] :tv: tvOS
- [ ] :monkey: Xamarin.Forms
- [ ] :🌍: Blazor
