stable-diffusion 2 gone from huggingface

this is causing inductor test and benchmark failures. I am going to skip the tests. We should update the models to a different version of stable diffusion that is still available.

https://huggingface.co/stabilityai/stable-diffusion-2

cc @ezyang @gchanan @kadeng @msaroufim @chauhang @penguinwu

Start by locating the Inductor tests and benchmarks that reference stabilityai/stable-diffusion-2, then check the linked Hugging Face model page and available replacement versions. Update the affected model references and verify that the tests and benchmarks no longer fail without being skipped.

Written by the indexing model from the issue text.