Allow passing different prompts to each `text_encoder` on `stable_diffusion_xl` pipelines (#4156)
* sdxl prompt2
* Improve checks
* doc linting
* whoops
* remove cat
* Apply suggestions from code review
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>
* Add other pipelines and tests
* Add multi-prompting to docs
* doc and copies check
* Fix copied froms
* Apply suggestions from code review
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>
* Bring back the original code for unrelated files
* Fix tests
* Fix img2img
* Fix all
* fix
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Co-authored-by: multimodalart <joaopaulo.passos+multimodal@gmail.com>
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>