Deprecate `upcast_vae` in SDXL based pipelines (#12619)
* update
* update
* Revert "update"
This reverts commit 73906381ab76da96eb8f9b841177cd4f49861eb1.
* Revert "update"
This reverts commit 21a03f93ef0fbfa5f7a7d97708f75149b1d1b3b0.
* update
* update
* update
* update
* update
