Model/Pipeline/Scheduler description

It looks like there is a variant of the very nice DPM++ scheduler on k-diffusion, see here: https://github.com/crowsonkb/k-diffusion/blob/5b3af030dd83e0297272d861c19477735d0317ec/k_diffusion/sampling.py#L543

It would be nice to add this one to diffusers as well.

Also gently pinging the author of DPM++ @LuChengTHU (have you played around with a stochastic variant of your scheduler as well?)

Open source status

• The model implementation is available
• The model weights are available (Only relevant if addition is not a scheduler).

Provide useful links for the implementation

No response