Fix graph break in torch.compile when using FA2 with attention_mask=None and batch size > 1

[efsotr]

What does this PR do?

Fixes partial #37199 (comment)

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@ArthurZucker

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[ArthurZucker]

Thanks, can we add a test ! 🤗

[efsotr]

due to #37092 , the added test can pass when export DISABLE_KERNEL_MAPPING=1

[llllvvuu]

Is this ready to merge? @ArthurZucker

[efsotr]

ready to merge! @ArthurZucker

[ArthurZucker]

Merging sorry!

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