Texture refactor

-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

servers/visual/visual_server_wrap_mt.cpp

@@ -136,7 +136,6 @@ void VisualServerWrapMT::finish() {
 		visual_server->finish();
 	}
 
-	texture_free_cached_ids();
 	sky_free_cached_ids();
 	shader_free_cached_ids();
 	material_free_cached_ids();