[Inference] Overrides snippets inputs

[krampstudio]

So we can call

snippets.getInferenceSnippets(model, "auto", undefined, {
   inputs: `"A dog with a baseball cap"`
});

to get the following sample

# output is a PIL.Image object
image = client.text_to_image(
    "A dog with a baseball cap",
    model="black-forest-labs/FLUX.1-dev",
)

instead of the default input in the snippet:

image = client.text_to_image(
    "Astronaut riding a horse",
    model="black-forest-labs/FLUX.1-dev",
)

it's already possible to do it for text-generation with opts.mesages

needed for (internal https://github.com/huggingface-internal/moon-landing/pull/14421)

[SBrandeis]

I guess you also need to add support for this in the different inputPreparationFns?

[krampstudio]

yes, something like b366ee4 should allow to override all input options