### 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)

}
					drag = true;
					if (atlas_tex.is_valid()) {
						rect_prev = atlas_tex->get_region();
					} else if (node_sprite_2d) {
						rect_prev = node_sprite_2d->get_region_rect();
					} else if (node_sprite_3d) {
						rect_prev = node_sprite_3d->get_region_rect();
					} else if (node_ninepatch) {
						rect_prev = node_ninepatch->get_region_rect();
					} else if (obj_styleBox.is_valid()) {
						rect_prev = obj_styleBox->get_region_rect();
					}
					for (int i = 0; i < 8; i++) {
						Vector2 tuv = endpoints[i];
						if (tuv.distance_to(mb->get_position()) < handle_radius) {
							drag_index = i;
						}
					}
					if (drag_index == -1) {
						creating = true;
						rect = Rect2(drag_from, Size2());
					}
				}
			} else if (!mb->is_pressed() && drag) {
				if (edited_margin >= 0) {
					undo_redo->create_action(TTR("Set Margin"));
					static Side side[4] = { SIDE_TOP, SIDE_BOTTOM, SIDE_LEFT, SIDE_RIGHT };
					if (node_ninepatch) {
						undo_redo->add_do_method(node_ninepatch, "set_patch_margin", side[edited_margin], node_ninepatch->get_patch_margin(side[edited_margin]));