### 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)

if (node_ninepatch || obj_styleBox.is_valid()) {
					edited_margin = -1;
					float margins[4] = { 0 };
					if (node_ninepatch) {
						margins[0] = node_ninepatch->get_patch_margin(SIDE_TOP);
						margins[1] = node_ninepatch->get_patch_margin(SIDE_BOTTOM);
						margins[2] = node_ninepatch->get_patch_margin(SIDE_LEFT);
						margins[3] = node_ninepatch->get_patch_margin(SIDE_RIGHT);
					} else if (obj_styleBox.is_valid()) {
						margins[0] = obj_styleBox->get_texture_margin(SIDE_TOP);
						margins[1] = obj_styleBox->get_texture_margin(SIDE_BOTTOM);
						margins[2] = obj_styleBox->get_texture_margin(SIDE_LEFT);
						margins[3] = obj_styleBox->get_texture_margin(SIDE_RIGHT);
					}
					Vector2 pos[4] = {
						mtx.basis_xform(rect.position + Vector2(0, margins[0])) - draw_ofs * draw_zoom,
						mtx.basis_xform(rect.position + rect.size - Vector2(0, margins[1])) - draw_ofs * draw_zoom,
						mtx.basis_xform(rect.position + Vector2(margins[2], 0)) - draw_ofs * draw_zoom,
						mtx.basis_xform(rect.position + rect.size - Vector2(margins[3], 0)) - draw_ofs * draw_zoom
					};
					if (Math::abs(mb->get_position().y - pos[0].y) < 8) {
						edited_margin = 0;
						prev_margin = margins[0];
					} else if (Math::abs(mb->get_position().y - pos[1].y) < 8) {
						edited_margin = 1;
						prev_margin = margins[1];
					} else if (Math::abs(mb->get_position().x - pos[2].x) < 8) {
						edited_margin = 2;
						prev_margin = margins[2];
					} else if (Math::abs(mb->get_position().x - pos[3].x) < 8) {