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>