[WIP] InferenceClient latent-to-image

[hlky]

Context: https://huggingface.slack.com/archives/C065E480NN9/p1738859836468269 (internal)

Depends: huggingface/api-inference-community#469

Will be used from Diffusers.

[sayakpaul]

Perhaps an example usage snippet?

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[Wauplin]

(as discussed on Slack -internal link-, let's pause this PR for now until we decide to official support latent-to-image as a task. First experiments can be conducted with a simple requests snippet)