[LoRA] make lora alpha and dropout configurable (#11467)
* add lora_alpha and lora_dropout
* Apply style fixes
* add lora_alpha and lora_dropout
* Apply style fixes
* revert lora_alpha until #11324 is merged
* Apply style fixes
* empty commit
---------
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
