### 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
if (texture.is_null()) {
		
		texture = RenderingServer::get_singleton()->texture_2d_placeholder_create();
	}
	return texture;
}
bool ImageTexture::has_alpha() const {
	return (format == Image::FORMAT_LA8 || format == Image::FORMAT_RGBA8);
}
void ImageTexture::draw(RID p_canvas_item, const Point2 &p_pos, const Color &p_modulate, bool p_transpose) const {
	if ((w | h) == 0) {
		return;
	}
	RenderingServer::get_singleton()->canvas_item_add_texture_rect(p_canvas_item, Rect2(p_pos, Size2(w, h)), texture, false, p_modulate, p_transpose);
}
void ImageTexture::draw_rect(RID p_canvas_item, const Rect2 &p_rect, bool p_tile, const Color &p_modulate, bool p_transpose) const {
	if ((w | h) == 0) {
		return;
	}
	RenderingServer::get_singleton()->canvas_item_add_texture_rect(p_canvas_item, p_rect, texture, p_tile, p_modulate, p_transpose);
}
void ImageTexture::draw_rect_region(RID p_canvas_item, const Rect2 &p_rect, const Rect2 &p_src_rect, const Color &p_modulate, bool p_transpose, bool p_clip_uv) const {
	if ((w | h) == 0) {
		return;
	}
	RenderingServer::get_singleton()->canvas_item_add_texture_rect_region(p_canvas_item, p_rect, texture, p_src_rect, p_modulate, p_transpose, p_clip_uv);
}
bool ImageTexture::is_pixel_opaque(int p_x, int p_y) const {