Add reference_attn & reference_adain support for sdxl

[zideliu]

What does this PR do?

It provides reference support for sdxl model, based on stable_diffusion_reference

Fixes # (issue)

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[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint.

[DN6]

@zideliu PR looks good. Could you provide some example generations from the pipelines to add to the README so that other users can see the expected types of output from the pipeline.

[zideliu]

@zideliu PR looks good. Could you provide some example generations from the pipelines to add to the README so that other users can see the expected types of output from the pipeline.

OK!

[DN6]

Thanks for adding the examples @zideliu. I took a look at them, but I can't seem to see any difference between the output image and reference image. Is it possible to try creating an output image where the difference is more obvious?

[zideliu]

Thanks for adding the examples @zideliu. I took a look at them, but I can't seem to see any difference between the output image and reference image. Is it possible to try creating an output image where the difference is more obvious?

Done !

[DN6]

LGTM 👍🏽

[DN6]

@zideliu Nicely done. Could you run make quality && make style so that the code quality checks pass. We should be ready to merge then.

[zideliu]

OK ~

[DN6]

Nice job @zideliu 👍🏽

[blx0102]

I tried some images, but the result somehow not really good, the face is usually distorted. Is this normal?

[zideliu]

Try increasing inference_steps, such as 50

[blx0102]

@zideliu Have tried but it didn't help