[Pipelines] Support for Mixture of Diffusers

[kadirnar]

Github: https://github.com/albarji/mixture-of-diffusers
Paper: https://arxiv.org/abs/2302.02412
HF Demo: https://huggingface.co/spaces/albarji/mixture-of-diffusers

[sayakpaul]

IIUC the authors already provide the pipeline in their codebase. So, I would maybe prefer it if the users follow their codebase for this.

@patrickvonplaten WDYT?

[kadirnar]

I want to add this because I want to use pip package.

[bghira]

wouldn't it also be feasible to use this plus Controlnet Tiles to break a single image into tiles and upscale and then possibly inpaint the seams?