Fix from_single_file for xl_inpaint

[Gothos]

What does this PR do?

Fixes #9052 by making xl_inpaint available as an option in infer_diffusers_model_type.

Fixes # (issue)
#9052

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[Gothos]

@sayakpaul / @DN6 ?

[HuggingFaceDocBuilderDev]

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