david/flash-attention: flash-attention from https://github.com/Dao-AILab/flash-attention @ fa3-fp8-varlen

kopia lustrzana https://github.com/Dao-AILab/flash-attention

Tri Dao 0bf5e50038 Release training code		2 lat temu
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openwebtext.yaml	0bf5e50038 Release training code	2 lat temu
thepile.yaml	0bf5e50038 Release training code	2 lat temu