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

platform/javascript/os_javascript.cpp

@@ -480,7 +480,7 @@ void OS_JavaScript::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_s
 			cursors_cache.erase(p_shape);
 		}
 
-		Ref<Texture> texture = p_cursor;
+		Ref<Texture2D> texture = p_cursor;
 		Ref<AtlasTexture> atlas_texture = p_cursor;
 		Ref<Image> image;
 		Size2 texture_size;