Flash Diffusion 加速文生图模型生成；Pixart-α加速测试

参考：https://github.com/gojasper/flash-diffusion
https://huggingface.co/jasperai/flash-pixart

安装包注意：

diffusers 这里是官方上面有更改，参考：https://github.com/gojasper/flash-diffusion/blob/main/requirements.txt

pip install -r requirements.txt

diffusers @ git+https://github.com/initml/diffusers.git@clement/feature/flash
--extra-index-url https://download.pytorch.org/whl/cu118