Is your feature request related to a problem? Please describe.
In #12236 , flash-attn-3 support was introduced for diffusers using the kernel implementation. I believe that adding the kernels-community/flash-attn can help users who don't have access to Hopper GPUs. If needed, I could help in the integration of the kernel.

cc: @sayakpaul

Describe the solution you'd like.

Integrate kernels-community/flash-attn support into diffusers.