[Feature Request]: new inverse DDIM / DPM fast / DPM adaptative samplers available for img2img alternative

[Ehplodor]

Is there an existing issue for this?

• I have searched the existing issues and checked the recent builds/commits

What would your feature do ?

Would it be possible to implement the code from bloc97/CrossAttentionControl@7482fb2 in order to support inverse DDIM in img2img alternative script ?

reverse sampling also available for DPM fast and DPM adaptative : crowsonkb/k-diffusion@8413eb2

Thank you.

Proposed workflow

1. Go to img2img
2. choose "alternative" script
3. choose between "inverse Euler", "inverse DDIM", "reverse DPM Fast" and "reverse DPM adaptative" method
4. proceed as usual

Additional information

in contradiction with #1149 (commited) and #2375 (abandoned), and wiki https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Features#img2img-alternative-test because current img2img alt script relies only on inverse euler