Add support to pass image embeddings to the WAN I2V pipeline. (#11175)
* Add support to pass image embeddings to the pipeline.
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Co-authored-by: hlky <hlky@hlky.ac>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: YiYi Xu <yixu310@gmail.com>