Make so that Control x:DataType overrides CollectionView.ItemTemplate DataTemplate x:DataType for the Control

### Description

While there are some solutions to write bindings with ancestor access inside CollectionViews to access ViewModel properties after setting a Model, if would be much more natural and convenient to write it as is:

```

```

So the label data type seeks properties inside the ViewModel, instead of the Model referenced above by

```

```

### Public API Changes

Make so that a Control x:DataType has priority above all else even inside a CollectionView

### Intended Use-Case

Making things simpler and more intuitive when dealing with data types and bindings inside collection views