### Godot version

4.0.dev (d0398f62f0)

### System information

Windows 10

### Issue description

`PlaceholderTexture2D::size` property is registered as a `Vector2I`: https://github.com/godotengine/godot/blob/0daa86d70e7338506c37bee6b6e0c4aba7255d68/scene/resources/texture.cpp#L3389  
It should be a `Vector2`, as setter method use a `Vector2` and so parent class getter method.

### Steps to reproduce

N/A

### Minimal reproduction project

N/A
rid = RS::get_singleton()->texture_2d_placeholder_create();
}
PlaceholderTexture2D::~PlaceholderTexture2D() {
	RS::get_singleton()->free(rid);
}
void PlaceholderTexture3D::set_size(const Vector3i &p_size) {
	size = p_size;
}
Vector3i PlaceholderTexture3D::get_size() const {
	return size;
}
Image::Format PlaceholderTexture3D::get_format() const {
	return Image::FORMAT_RGB8;
}
int PlaceholderTexture3D::get_width() const {
	return size.x;
}
int PlaceholderTexture3D::get_height() const {
	return size.y;
}
int PlaceholderTexture3D::get_depth() const {
	return size.z;
}
bool PlaceholderTexture3D::has_mipmaps() const {
	return false;
}
Vector<Ref<Image>> PlaceholderTexture3D::get_data() const {