Modifying collision via SetTile does not recreate physics state or mark it dirty to do so later

It should probably mark it as dirty but not recreate until end of frame (or expose it as a param to the method) since procedural generation would be too slow otherwise.

We should also offer a function to explicitly do it right now when you need to force it to happen (basically expose an alias for RecreatePhysicsState on UPaperTileMapComponent).