Remove all uses of `ContainerView`

[PureWeen]

Description

Not to be confused with WrapperView which we still use on a view-by-view basis to handle scenarios where a view needs to be wrapped.

We currently have this concept of a ContainerView inside .NET MAUI that was only used to handle early versions of code based hot reload. AFAIK these cases are no longer valid so we should just remove ContainerView and the complexity surrounding it. There are issues that crop up every so often with having to maintain the behavior of ContainerView #14867. Also, we have too many things named ContainerView :-)

If I'm mistaken and this view is currently being used, then please let me know and we can close this issue :-)

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[drasticactions]

XAML Hot Reload doesn't check for any of those views (Nor interfaces like IReloadHandler and IHotReloadableView). IMO if we could reduce the complexity and get rid of all of that, it would be a plus.