[DC-AE] support tiling for DC-AE (#10510)
* autoencoder_dc tiling
* add tiling and slicing support in SANA pipelines
* create variables for padding length because the line becomes too long
* add tiling and slicing support in pag SANA pipelines
* revert changes to tile size
* make style
* add vae tiling test
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Co-authored-by: Aryan <aryan@huggingface.co>
