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f10d3c6d - [LoRA] add LoRA support to Lumina2 and fine-tuning script (#10818)

[LoRA] add LoRA support to Lumina2 and fine-tuning script (#10818) * feat: lora support for Lumina2. * fix-copies. * updates * updates * docs. * fix * add: training script. * tests * updates * updates * major updates. * updates * fixes * docs. * updates * updates