[WIP] Wan2.2 (#12004)
* support wan 2.2 i2v
* add t2v + vae2.2
* add conversion script for vae 2.2
* add
* add 5b t2v
* conversion script
* refactor out reearrange
* remove a copied from in skyreels
* Apply suggestions from code review
Co-authored-by: bagheera <59658056+bghira@users.noreply.github.com>
* Update src/diffusers/models/transformers/transformer_wan.py
* fix fast tests
* style
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Co-authored-by: bagheera <59658056+bghira@users.noreply.github.com>
