ep: Use rejected_output for DPO training + OpenAI support (#47697)

Release Notes:

- N/A

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Co-authored-by: Zed Zippy <234243425+zed-zippy[bot]@users.noreply.github.com>
757ee0571eOleksiy Syvokon committed on 1/27/2026, 1:02:40 PM· committed by GitHubparent4866861
13 files changedLine totals unavailable