### 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)

}
									merged = true;
								}
							}
						}
						found = true;
						break;
					}
				}
				if (!found) {
					Rect2 new_rect(x, y, 1, 1);
					autoslice_cache.push_back(new_rect);
				}
			}
		}
	}
	cache_map[texture->get_rid()] = autoslice_cache;
}
void TextureRegionEditor::_notification(int p_what) {
	switch (p_what) {
		case NOTIFICATION_EXIT_TREE: {
			get_tree()->disconnect("node_removed", callable_mp(this, &TextureRegionEditor::_node_removed));
		} break;
		case NOTIFICATION_ENTER_TREE: {
			get_tree()->connect("node_removed", callable_mp(this, &TextureRegionEditor::_node_removed));
			[[fallthrough]];
		}
		case NOTIFICATION_THEME_CHANGED: {
			edit_draw->add_theme_style_override("panel", get_theme_stylebox(SNAME("panel"), SNAME("Tree")));
		} break;