### 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)

Ref<StyleBoxTexture> style(memnew(StyleBoxTexture));
	style->set_texture(p_texture);
	style->set_texture_margin_individual(p_left * EDSCALE, p_top * EDSCALE, p_right * EDSCALE, p_bottom * EDSCALE);
	style->set_content_margin_individual((p_left + p_margin_left) * EDSCALE, (p_top + p_margin_top) * EDSCALE, (p_right + p_margin_right) * EDSCALE, (p_bottom + p_margin_bottom) * EDSCALE);
	style->set_draw_center(p_draw_center);
	return style;
}
static Ref<StyleBoxEmpty> make_empty_stylebox(float p_margin_left = -1, float p_margin_top = -1, float p_margin_right = -1, float p_margin_bottom = -1) {
	Ref<StyleBoxEmpty> style(memnew(StyleBoxEmpty));
	style->set_content_margin_individual(p_margin_left * EDSCALE, p_margin_top * EDSCALE, p_margin_right * EDSCALE, p_margin_bottom * EDSCALE);
	return style;
}
static Ref<StyleBoxFlat> make_flat_stylebox(Color p_color, float p_margin_left = -1, float p_margin_top = -1, float p_margin_right = -1, float p_margin_bottom = -1, int p_corner_width = 0) {
	Ref<StyleBoxFlat> style(memnew(StyleBoxFlat));
	style->set_bg_color(p_color);
	
	style->set_corner_detail(Math::ceil(0.8 * p_corner_width * EDSCALE));
	style->set_corner_radius_all(p_corner_width * EDSCALE);
	style->set_content_margin_individual(p_margin_left * EDSCALE, p_margin_top * EDSCALE, p_margin_right * EDSCALE, p_margin_bottom * EDSCALE);
	
	style->set_anti_aliased(false);
	return style;
}
static Ref<StyleBoxLine> make_line_stylebox(Color p_color, int p_thickness = 1, float p_grow_begin = 1, float p_grow_end = 1, bool p_vertical = false) {