diffusers

6b9a3334 - reverts accidental change that removes attn_mask in attn. Improves fl… (#11065)

reverts accidental change that removes attn_mask in attn. Improves fl… (#11065) reverts accidental change that removes attn_mask in attn. Improves flux ptxla by using flash block sizes. Moves encoding outside the for loop. Co-authored-by: Juan Acevedo <jfacevedo@google.com>