PAG variant for AnimateDiff (#8789)
* add animatediff pag pipeline
* remove unnecessary print
* make fix-copies
* fix ip-adapter bug
* update docs
* add fast tests and fix bugs
* update
* update
* address review comments
* update ip adapter single test expected slice
* implement test_from_pipe_consistent_config; fix expected slice values
* LoraLoaderMixin->StableDiffusionLoraLoaderMixin; add latest freeinit test
