Ulysses HF Accelerate integration (#7638)
Ulysses/ALST integration with HF Accelerate:
- Allow `UlyssesSPAttentionHF.register_with_transformers` to get a
`model` obj as an argument, to match HF accelerate's workflow
- Fix existing Ulysses' tests to tests z2 instead of z1
- Improve documentation
- Add a defensive check
The HF Accelerate PR that depends on this PR is here
https://github.com/huggingface/accelerate/pull/3817
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Signed-off-by: Stas Bekman <stas@stason.org>
