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dc55124e - Fix BucketBatchSampler cache alignment in DreamBooth scripts (#13353)

Fix BucketBatchSampler cache alignment in DreamBooth scripts (#13353) * Fix bucket sampler cache alignment in DreamBooth scripts * Shuffle precomputed DreamBooth bucket batches once * Scope stable bucket ordering to cached DreamBooth batches * Format DreamBooth bucket sampler updates * Address bucket sampler cache variable naming review --------- Co-authored-by: Linoy Tsaban <57615435+linoytsaban@users.noreply.github.com> Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>