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cfdfcf20 - Add --vae_precision option to the SDXL pix2pix script so that we have… (#4881)

Add --vae_precision option to the SDXL pix2pix script so that we have… (#4881) * Add --vae_precision option to the SDXL pix2pix script so that we have the option of avoiding float32 overhead * style --------- Co-authored-by: bghira <bghira@users.github.com>