diffusers

983dec3b - [Core] Introduce class variants for `Transformer2DModel` (#7647)

[Core] Introduce class variants for `Transformer2DModel` (#7647) * init for patches * finish patched model. * continuous transformer * vectorized transformer2d. * style. * inits. * fix-copies. * introduce DiTTransformer2DModel. * fixes * use REMAPPING as suggested by @DN6 * better logging. * add pixart transformer model. * inits. * caption_channels. * attention masking. * fix use_additional_conditions. * remove print. * debug * flatten * fix: assertion for sigma * handle remapping for modeling_utils * add tests for dit transformer2d * quality * placeholder for pixart tests * pixart tests * add _no_split_modules * add docs. * check * check * check * check * fix tests * fix tests * move Transformer output to modeling_output * move errors better and bring back use_additional_conditions attribute. * add unnecessary things from DiT. * clean up pixart * fix remapping * fix device_map things in pixart2d. * replace Transformer2DModel with appropriate classes in dit, pixart tests * empty * legacy mixin classes./ * use a remapping dict for fetching class names. * change to specifc model types in the pipeline implementations. * move _fetch_remapped_cls_from_config to modeling_loading_utils.py * fix dependency problems. * add deprecation note.