Dispatch refactor of materials/lights/... for shorter shader compilation time

[OldNew777]

Now the dispatch code will generate closure codes for each surface instance, even if some of the instances have the same surface type. And this feature brings long shader compilation time and long generated code length for complex scenes.

We are trying to refactor these codes to separate data dispatch and function dispatch.

[Mike-Leo-Smith]

Surfaces are good now. TODO: Lights.