[WIP] Add InfiniteTalk Audio-Driven Video Generation Pipeline

[dg845]

What does this PR do?

This PR implements a pipeline for the InfiniteTalk audio-driven video generation model (paper, code, weights). The InfiniteTalk model is designed to handle infinite-length video and demonstrates SOTA performance for video dubbing. It is ultimately based on the Wan 2.1-I2V-14B image-to-video model (with extra audio components).

Fixes #12239.

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