diffusers

8c892c90 - [lora training] align krea2/qwen bucketing with the on-the-fly interface

[lora training] align krea2/qwen bucketing with the on-the-fly interface Gate bucketing behind --use_aspect_ratio_buckets (a list without it errors), compute buckets on the fly capped to each image's own resolution via the shared training_utils helper, and drop --bucket_no_upscale and padding. Skip the opt-in bucketing/caption dropout qwen tests, matching the flux2/kontext/z-image scripts.