### 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)

sb_checkbox->set_content_margin_all(default_margin_size * EDSCALE);
	theme->set_stylebox("normal", "CheckBox", sb_checkbox);
	theme->set_stylebox("pressed", "CheckBox", sb_checkbox);
	theme->set_stylebox("disabled", "CheckBox", sb_checkbox);
	theme->set_stylebox("hover", "CheckBox", sb_checkbox);
	theme->set_stylebox("hover_pressed", "CheckBox", sb_checkbox);
	theme->set_icon("checked", "CheckBox", theme->get_icon(SNAME("GuiChecked"), SNAME("EditorIcons")));
	theme->set_icon("unchecked", "CheckBox", theme->get_icon(SNAME("GuiUnchecked"), SNAME("EditorIcons")));
	theme->set_icon("radio_checked", "CheckBox", theme->get_icon(SNAME("GuiRadioChecked"), SNAME("EditorIcons")));
	theme->set_icon("radio_unchecked", "CheckBox", theme->get_icon(SNAME("GuiRadioUnchecked"), SNAME("EditorIcons")));
	theme->set_icon("checked_disabled", "CheckBox", theme->get_icon(SNAME("GuiCheckedDisabled"), SNAME("EditorIcons")));
	theme->set_icon("unchecked_disabled", "CheckBox", theme->get_icon(SNAME("GuiUncheckedDisabled"), SNAME("EditorIcons")));
	theme->set_icon("radio_checked_disabled", "CheckBox", theme->get_icon(SNAME("GuiRadioCheckedDisabled"), SNAME("EditorIcons")));
	theme->set_icon("radio_unchecked_disabled", "CheckBox", theme->get_icon(SNAME("GuiRadioUncheckedDisabled"), SNAME("EditorIcons")));
	theme->set_color("font_color", "CheckBox", font_color);
	theme->set_color("font_hover_color", "CheckBox", font_hover_color);
	theme->set_color("font_hover_pressed_color", "CheckBox", font_hover_pressed_color);
	theme->set_color("font_focus_color", "CheckBox", font_focus_color);
	theme->set_color("font_pressed_color", "CheckBox", accent_color);
	theme->set_color("font_disabled_color", "CheckBox", font_disabled_color);
	theme->set_color("font_outline_color", "CheckBox", font_outline_color);
	theme->set_color("icon_normal_color", "CheckBox", icon_normal_color);
	theme->set_color("icon_hover_color", "CheckBox", icon_hover_color);
	theme->set_color("icon_focus_color", "CheckBox", icon_focus_color);
	theme->set_color("icon_pressed_color", "CheckBox", icon_pressed_color);
	theme->set_color("icon_disabled_color", "CheckBox", icon_disabled_color);
	theme->set_constant("h_separation", "CheckBox", 8 * EDSCALE);
	theme->set_constant("check_v_offset", "CheckBox", 0);
	theme->set_constant("outline_size", "CheckBox", 0);