Support fine-tuning for chatgpt 3.5

We can fine-tune gpt 3.5 i.e chat_gpt according to [official blog](https://openai.com/blog/gpt-3-5-turbo-fine-tuning-and-api-updates) and [docs](https://platform.openai.com/docs/guides/fine-tuning)

So, isn't it a good idea to remove the below line and make sure fine-tuning happens?
https://github.com/anarchy-ai/LLM-VM/blob/3b4ade5a40c5160b71642373ae19ba8391066f84/src/llm_vm/onsite_llm.py#L444

Note: `gpt-3.5-turbo-0301` is used in `generate` method but `gpt-3.5-turbo-0613` supports fine-tuning. Suffix is a different number.