skip draw calls for an image when possible

[hajimehoshi]

What feature would you like to be added?

This is a suggestion rather than a feature request.

The idea is from https://github.com/hajimehoshi/ebiten/issues/2341.

By comparing draw calls for an image, we might be able to skip the entire draw calls for the image if the commands are the completely same.

Why is this needed?

We will be able to get better performance without chaning user's code