* work in progress, fixing tests for numpy and make deterministic
* make tests pass via pytorch
* make pytorch == numpy test cleaner
* change default tensor format pndm --> pt
* clean ddpm api to match ddim
* correct ve sde class
* update pipeline API for ve sde
* make style
* Apply suggestions from code review
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>
* improve comments for sde_ve scheduler, init tests
* more comments, tweaking pipelines
* timesteps --> num_training_timesteps, some comments
* merge cpu test, add m1 data
* fix scheduler tests with num_train_timesteps
* make np compatible, add tests for sde ve
* minor default variable fixes
* make style and fix-copies
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>