### 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
ERR_FAIL_COND_MSG(p_width <= 0 || p_width > 16384, "Texture dimensions have to be within 1 to 16384 range.");
	width = p_width;
	_queue_update();
}
int GradientTexture2D::get_width() const {
	return width;
}
void GradientTexture2D::set_height(int p_height) {
	ERR_FAIL_COND_MSG(p_height <= 0 || p_height > 16384, "Texture dimensions have to be within 1 to 16384 range.");
	height = p_height;
	_queue_update();
}
int GradientTexture2D::get_height() const {
	return height;
}
void GradientTexture2D::set_use_hdr(bool p_enabled) {
	if (p_enabled == use_hdr) {
		return;
	}
	use_hdr = p_enabled;
	_queue_update();
}
bool GradientTexture2D::is_using_hdr() const {
	return use_hdr;
}
void GradientTexture2D::set_fill_from(Vector2 p_fill_from) {