diffusers

4e5a9efd - update conversion script for SANA-1.5 and SANA-Sprint (#11082)

update conversion script for SANA-1.5 and SANA-Sprint (#11082) * 1. update conversion script for sana1.5; 2. add conversion script for sana-sprint; * seperate sana and sana-sprint conversion scripts; * update for upstream * fix the } bug * add a doc for SanaSprintPipeline; * minor update; * make style && make quality