[iOS] Use a GeneralWrapperView for the EmptyView on CollectionView

[rmarinho]

Description of Change

When the empty view only had 1 button , no layout, it wasn't renderer correctly , the height was always 0. So we can reuse the same approach from CV2 , and reuse the code to fix both approaches for now.

This pull request includes several changes to the iOS handlers and template helpers in the src/Controls/src/Core/Handlers/Items directory. The most significant changes involve the introduction of a new GeneralWrapperView class to replace UIContainerView2 and updates to the handling of views in the TemplateHelpers and TemplatedCell2 classes.

Introduction of GeneralWrapperView:

• Added a new GeneralWrapperView class in src/Controls/src/Core/Platform/iOS/GeneralWrapperView.cs to handle the wrapping of views, enabling better measurement and arrangement.

Updates to TemplateHelpers:

• Modified the RealizeView method in TemplateHelpers.cs to replace UIContainerView2 with GeneralWrapperView, improving the handling of views without templates.
• Removed unnecessary using directives and added new ones to reflect the changes in dependencies.

Updates to TemplatedCell2:

• Replaced instances of UIContainerView2 with GeneralWrapperView in the BindVirtualView method to ensure consistent handling of views.
• Removed the UIContainerView2 class from TemplatedCell2.cs, as it is now replaced by GeneralWrapperView.

Minor Cleanup:

• Removed an unnecessary blank line in ItemsViewController.cs to maintain code cleanliness.

To test
Test for issue #19609 should pass

Issues Fixed

Fixes #26508

[kubaflo]

I wonder if there are maybe other internal UiViews that act as containers that should be replaced by this GeneralWrapperView?

[jfversluis]

General WrapperView 🫡