[Pipeline] Add LEDITS++ pipelines (#6074)
* Setup LEdits++ file structure
* Fix import
* LEditsPP Stable Diffusion pipeline
* Include variable image aspect ratios
* Implement LEDITS++ for SDXL
* clean up LEditsPPPipelineStableDiffusion
* Adjust inversion output
* Added docu, more cleanup for LEditsPPPipelineStableDiffusion
* clean up LEditsPPPipelineStableDiffusionXL
* Update documentation
* Fix documentation import
* Add skeleton IF implementation
* Fix documentation typo
* Add LEDTIS docu to toctree
* Add missing title
* Finalize SD documentation
* Finalize SD-XL documentation
* Fix code style and quality
* Fix typo
* Fix return types
* added LEditsPPPipelineIF; minor changes for LEditsPPPipelineStableDiffusion and LEditsPPPipelineStableDiffusionXL
* Fix copy reference
* add documentation for IF
* Add first tests
* Fix batching for SD-XL
* Fix text encoding and perfect reconstruction for SD-XL
* Add tests for SD-XL, minor changes
* move user_mask to correct device, use cross_attention_kwargs also for inversion
* Example docstring
* Fix attention resolution for non-square images
* Refactoring for PR review
* Safely remove ledits_utils.py
* Style fixes
* Replace assertions with ValueError
* Remove LEditsPPPipelineIF
* Remove unecessary input checks
* Refactoring of CrossAttnProcessor
* Revert unecessary changes to scheduler
* Remove first progress-bar in inversion
* Refactor scheduler usage and reset
* Use imageprocessor instead of custom logic
* Fix scheduler init warning
* Fix error when running the pipeline in fp16
* Update documentation wrt perfect inversion
* Update tests
* Fix code quality and copy consistency
* Update LEditsPP import
* Remove enable/disable methods that are now in StableDiffusionMixin
* Change import in docs
* Revert import structure change
* Fix ledits imports
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Co-authored-by: Katharina Kornmeier <katharina.kornmeier@stud.tu-darmstadt.de>
