### 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_icon("radio_checked", "PopupMenu", theme->get_icon(SNAME("GuiRadioChecked"), SNAME("EditorIcons")));
	theme->set_icon("radio_unchecked", "PopupMenu", theme->get_icon(SNAME("GuiRadioUnchecked"), SNAME("EditorIcons")));
	theme->set_icon("checked_disabled", "PopupMenu", theme->get_icon(SNAME("GuiCheckedDisabled"), SNAME("EditorIcons")));
	theme->set_icon("unchecked_disabled", "PopupMenu", theme->get_icon(SNAME("GuiUncheckedDisabled"), SNAME("EditorIcons")));
	theme->set_icon("radio_checked_disabled", "PopupMenu", theme->get_icon(SNAME("GuiRadioCheckedDisabled"), SNAME("EditorIcons")));
	theme->set_icon("radio_unchecked_disabled", "PopupMenu", theme->get_icon(SNAME("GuiRadioUncheckedDisabled"), SNAME("EditorIcons")));
	theme->set_icon("submenu", "PopupMenu", theme->get_icon(SNAME("ArrowRight"), SNAME("EditorIcons")));
	theme->set_icon("submenu_mirrored", "PopupMenu", theme->get_icon(SNAME("ArrowLeft"), SNAME("EditorIcons")));
	theme->set_icon("visibility_hidden", "PopupMenu", theme->get_icon(SNAME("GuiVisibilityHidden"), SNAME("EditorIcons")));
	theme->set_icon("visibility_visible", "PopupMenu", theme->get_icon(SNAME("GuiVisibilityVisible"), SNAME("EditorIcons")));
	theme->set_icon("visibility_xray", "PopupMenu", theme->get_icon(SNAME("GuiVisibilityXray"), SNAME("EditorIcons")));
	
	
	
	const int vsep_base = extra_spacing + default_margin_size + 6;
	const int force_even_vsep = vsep_base + (vsep_base % 2);
	theme->set_constant("v_separation", "PopupMenu", force_even_vsep * EDSCALE);
	theme->set_constant("outline_size", "PopupMenu", 0);
	theme->set_constant("item_start_padding", "PopupMenu", default_margin_size * 1.5 * EDSCALE);
	theme->set_constant("item_end_padding", "PopupMenu", default_margin_size * 1.5 * EDSCALE);
	
	for (int i = 0; i < 16; i++) {
		Color si_base_color = accent_color;
		float hue_rotate = (i * 2 % 16) / 16.0;
		si_base_color.set_hsv(Math::fmod(float(si_base_color.get_h() + hue_rotate), float(1.0)), si_base_color.get_s(), si_base_color.get_v());
		si_base_color = accent_color.lerp(si_base_color, float(EDITOR_GET("docks/property_editor/subresource_hue_tint")));
		
		Ref<StyleBoxFlat> sub_inspector_bg = style_default->duplicate();
		sub_inspector_bg->set_bg_color(dark_color_1.lerp(si_base_color, 0.08));
		sub_inspector_bg->set_border_width_all(2 * EDSCALE);