fix SD XL ONNX export for img2img task #1194
Merged
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In this PR we use
StableDiffusionXLImg2ImgPipeline
to load a SD XL pipeline by default before exporting each component as it will allow some components to be optional during loading.Depending on the value of
requires_aesthetics_score
we create a dummy input of the corresponding expected shape https://github.com/huggingface/diffusers/blob/v0.18.2/src/diffusers/pipelines/stable_diffusion_xl/pipeline_stable_diffusion_xl_img2img.py#L571 when exporting the U-NET component