### 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
update_pending = false;
	if (gradient.is_null()) {
		return;
	}
	Ref<Image> image;
	image.instantiate();
	if (gradient->get_points_count() <= 1) { 
		image->initialize_data(width, height, false, (use_hdr) ? Image::FORMAT_RGBAF : Image::FORMAT_RGBA8);
		image->fill((gradient->get_points_count() == 1) ? gradient->get_color(0) : Color(0, 0, 0, 1));
	} else {
		if (use_hdr) {
			image->initialize_data(width, height, false, Image::FORMAT_RGBAF);
			Gradient &g = **gradient;
			
			for (int y = 0; y < height; y++) {
				for (int x = 0; x < width; x++) {
					float ofs = _get_gradient_offset_at(x, y);
					image->set_pixel(x, y, g.get_color_at_offset(ofs));
				}
			}
		} else {
			Vector<uint8_t> data;
			data.resize(width * height * 4);
			{
				uint8_t *wd8 = data.ptrw();
				Gradient &g = **gradient;
				for (int y = 0; y < height; y++) {
					for (int x = 0; x < width; x++) {
						float ofs = _get_gradient_offset_at(x, y);