-Texture renamed to Texture2D
-TextureLayered as base now inherits 2Darray, cubemap and cubemap array
-Removed all references to flags in textures (they will go in the shader)
-Texture3D gone for now (will come back later done properly)
-Create base rasterizer for RenderDevice, RasterizerRD
It will now raise an error whenever this happens so that we can fix
these situations. `max == min` is not allowed as it could lead to
divisions by zero in ratios, and `max < min` doesn't make much sense.
Fixes#33907.
This allows more consistency in the manner we include core headers,
where previously there would be a mix of absolute, relative and
include path-dependent includes.
