support SDPA Attention in stablelm

[eaidova]

What does this PR do?

enable SDPA attention in stablelm architecture

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[amyeroberts]

cc @fxmarty

[ArthurZucker]

Looks alright but we need to add an integration test iMO :)

[eaidova]

Looks alright but we need to add an integration test iMO :)

added

[ArthurZucker]

Looks good to me thanks for adding support for sdpa.
cc @younesbelkada we can copy from for phi

[ArthurZucker]

Missing one nit ! as noted by @younesbelkada

[younesbelkada]

Thanks a lot ! Left one comment to make the CI happy :D

[younesbelkada]

Thanks again ! Can you run the styling checks with make fixup ? 🙏

[younesbelkada]

This is very clean - thanks so much @eaidova ! 🙏

[HuggingFaceDocBuilderDev]

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