### 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)

theme->set_constant("scroll_border", "Tree", 40 * EDSCALE);
	theme->set_constant("scroll_speed", "Tree", 12);
	theme->set_constant("outline_size", "Tree", 0);
	theme->set_constant("scrollbar_margin_left", "Tree", 0);
	theme->set_constant("scrollbar_margin_top", "Tree", 0);
	theme->set_constant("scrollbar_margin_right", "Tree", 0);
	theme->set_constant("scrollbar_margin_bottom", "Tree", 0);
	theme->set_constant("scrollbar_h_separation", "Tree", 1 * EDSCALE);
	theme->set_constant("scrollbar_v_separation", "Tree", 1 * EDSCALE);
	const Color guide_color = mono_color * Color(1, 1, 1, 0.05);
	Color relationship_line_color = mono_color * Color(1, 1, 1, relationship_line_opacity);
	theme->set_constant("draw_guides", "Tree", relationship_line_opacity < 0.01);
	theme->set_color("guide_color", "Tree", guide_color);
	int relationship_line_width = 1;
	Color parent_line_color = mono_color * Color(1, 1, 1, CLAMP(relationship_line_opacity + 0.45, 0.0, 1.0));
	Color children_line_color = mono_color * Color(1, 1, 1, CLAMP(relationship_line_opacity + 0.25, 0.0, 1.0));
	theme->set_constant("draw_relationship_lines", "Tree", relationship_line_opacity >= 0.01);
	theme->set_constant("relationship_line_width", "Tree", relationship_line_width);
	theme->set_constant("parent_hl_line_width", "Tree", relationship_line_width * 2);
	theme->set_constant("children_hl_line_width", "Tree", relationship_line_width);
	theme->set_constant("parent_hl_line_margin", "Tree", relationship_line_width * 3);
	theme->set_color("relationship_line_color", "Tree", relationship_line_color);
	theme->set_color("parent_hl_line_color", "Tree", parent_line_color);
	theme->set_color("children_hl_line_color", "Tree", children_line_color);
	Ref<StyleBoxFlat> style_tree_btn = style_default->duplicate();
	style_tree_btn->set_bg_color(highlight_color);
	style_tree_btn->set_border_width_all(0);
	theme->set_stylebox("button_pressed", "Tree", style_tree_btn);
	Ref<StyleBoxFlat> style_tree_hover = style_default->duplicate();
	style_tree_hover->set_bg_color(highlight_color * Color(1, 1, 1, 0.4));