Remove BorderLayerRenderer on skia

[dr1rrb]

What would you like to be added

Border rendering should be manage by visuals directly. We should probably introduce a BorderShapeVisual (which inherits from the ShapeVisual that currently backs all UIElement) responsible to do the rendering of the "border like properties"

Why is this needed

• Would reduce the amount of work done each time a border like element is being re-layouted.
• Reduce noise about the corner radius clipping support (cf. https://github.com/unoplatform/uno/pull/16156)

For which platform

No response

Anything else we need to know?

No response