[PAG] add `StableDiffusionXLControlNetPAGImg2ImgPipeline`

[yiyixuxu]

We recently integrated PAG into diffusers! See the PR here: #7944

Does anyone want to add a StableDiffusionXLControlNetPAGImg2ImgPipeline?

1. You should put it under the pag folder
2. you can use the implementation of StableDiffusionXLControlNetPAGPipeline and StableDiffusionXLPAGImg2ImgPipeline as reference
3. you need to add AutoPipeline so that you can use this API to create it

    AutoPipelineForImage2Image.from_pretrained(repo_id, controlnet=controlnet, enable_pag=True ...)

4. tests and docs

[satani99]

hi @yiyixuxu, i'll contribute it
can you assign me?

[yiyixuxu]

@satani99 yes!

[tuanh123789]

can i work on this

[yiyixuxu]

@tuanh123789
this one is already taken :)
I opened a new issue here #8710
leave a comment there if you are interested

[asomoza]

Hi @satani99, I kind of need StableDiffusionXLControlNetPAGImg2ImgPipeline, are you still working on this? If you're having trouble with it you can just open the PR with what you have and we will help you.

[satani99]

I'll open a PR today.