add modular blockset for wan 2.2 vace (#14432)
* add modular blockset for wan 2.2 vace
* drop transformer from vace encoder components, adapt tests to new mixin structure
* regenerate stale vace blocks docstring
* generalize wan22 loop denoiser for vace, drop the vace copy
* Delete image.png
* fold trim_latents into the vace core denoise step
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Co-authored-by: YiYi Xu <yixu310@gmail.com>
