The OpenImageIO version we use has broken CMYK to RGB conversion in
JPEG, this is a temporary workaround until we upgrade to a newer
version. Directly read the CMYK image with libjpeg.
Note that when we upgrade, we can remove the CMYK conversion code
entirely as OpenImageIO supports this natively nowadays.
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NOTE: This is the backport for 5.1.1.
Pull Request: https://projects.blender.org/blender/blender/pulls/157146