add config_file to from_single_file (#4614)
* Update loaders.py
add config_file to from_single_file,
when the download_from_original_stable_diffusion_ckpt use
* Update loaders.py
add config_file to from_single_file,
when the download_from_original_stable_diffusion_ckpt use
* change config_file to original_config_file
* make style && make quality
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Co-authored-by: jianghua.zuo <jianghua.zuo@weimob.com>
Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com>
