### Godot version

v4.0.1.stable.official [cacf49999]

### System information

Windows 10

### Issue description

If you use Sprite2D with a regular CompressedTexture and set a Region on it, then use a Sprite2D with a CanvasTexture and a different texture in the diffuse, and try to set a Region, the Region Editor display will show the texture from the first sprite2D node. I would expect it to show the diffuse texture from the current Sprite2D.
![image](https://user-images.githubusercontent.com/7292421/231493673-4eb152e0-81ed-4248-8465-71242c291cd2.png)
![image](https://user-images.githubusercontent.com/7292421/231493749-6173993b-e77c-4899-961e-9a055c07e351.png)




### Steps to reproduce

Make a sprite2D node
add a texture to it 
set Region to Enabled
click Edit Region under 'Region'
set any region

Make another sprite2D node
add a CanvasTexture to it
add a different texture to the Diffuse part
set Region to Enabled
click Edit Region under 'Region'
see wrong texture

### Minimal reproduction project

[RegionEditorBug.zip](https://github.com/godotengine/godot/files/11212626/RegionEditorBug.zip)

break;
			}
		} else {
			filter = CanvasItem::TEXTURE_FILTER_NEAREST_WITH_MIPMAPS;
		}
	}
	if (texture.is_null()) {
		preview_tex->set_diffuse_texture(nullptr);
		_zoom_reset();
		hscroll->hide();
		vscroll->hide();
		edit_draw->queue_redraw();
		return;
	}
	preview_tex->set_texture_filter(filter);
	preview_tex->set_diffuse_texture(texture);
	if (cache_map.has(texture->get_rid())) {
		autoslice_cache = cache_map[texture->get_rid()];
		autoslice_is_dirty = false;
	} else {
		if (is_visible() && snap_mode == SNAP_AUTOSLICE) {
			_update_autoslice();
		} else {
			autoslice_is_dirty = true;
		}
	}
	_update_rect();
	edit_draw->queue_redraw();
}
Vector2 TextureRegionEditor::snap_point(Vector2 p_target) const {