:art: fix xl playground device (#8550)
* :art: fix xl playground device
* :art: run `make fix-copies`
* :art: run `make fix-copies`
* edit xl_controlnet_img2img file
* edit playground img2img test slow
* Update tests/pipelines/stable_diffusion_xl/test_stable_diffusion_xl_img2img.py
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Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>
