Modular Diffusers Guiders (#11311)
* cfg; slg; pag; sdxl without controlnet
* support sdxl controlnet
* support controlnet union
* update
* update
* cfg zero*
* use unwrap_module for torch compiled modules
* remove guider kwargs
* remove commented code
* remove old guider
* fix slg bug
* remove debug print
* autoguidance
* smoothed energy guidance
* add note about seg
* tangential cfg
* cfg plus plus
* support cfgpp in ddim
* apply review suggestions
* refactor
* rename enable/disable
* remove cfg++ for now
* rename do_classifier_free_guidance->prepare_unconditional_embeds
* remove unused
