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40e96454 - Fix LTX-2 image-to-video generation failure in two stages generation (#13187)

Fix LTX-2 image-to-video generation failure in two stages generation (#13187) * Fix LTX-2 image-to-video generation failure in two stages generation In LTX-2's two-stage image-to-video generation task, specifically after the upsampling step, a shape mismatch occurs between the `latents` and the `conditioning_mask`, which causes an error in function `_create_noised_state`. Fix it by creating the `conditioning_mask` based on the shape of the `latents`. * Add unit test for LTX-2 i2v two stages inference with upsampler * Downscaling the upsampler in LTX-2 image-to-video unit test * Apply style fixes --------- Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>