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c6e56e92 - Add Recent Timestep Scheduling Improvements to DDIM Inverse Scheduler (#3865)

Add Recent Timestep Scheduling Improvements to DDIM Inverse Scheduler (#3865) * Add Recent Timestep Scheduling Improvements to DDIM Inverse Scheduler Roll timesteps by one to reflect origin-destination semantic discrepancy Restore `set_alpha_to_one` option to handle negative initial timesteps Remove `set_alpha_to_zero` option not used due to previous truncation * Bugfix * Remove unnecessary calls to `detach()` Use `self.image_processor.preprocess` in DiffEdit pipeline functions * Preprocess list input for inverted image latents in diffedit pipeline * Add `timestep_spacing` and `steps_offset` to `DPMSolverMultistepInverseScheduler` * Update expected test results to account for inverting last forward diffusion step * Fix inversion progress bar bug * Add first draft for proper fast tests for DDIMInverseScheduler * Add deprecated DDIMInverseScheduler kwarg to ConfigMixer registry * Fix test failure in DPMMultistepInverseScheduler Invert step specification leads to negative noise variance in SDE-based algs Add first draft for proper fast tests for DPMMultistepInverseScheduler * Update expected test results to account for inverting last forward diffusion step Clean up diffedit fast test