Added chatglm3 conversation type for training models like TinyLLama

[xaviviro]

No description provided.

[NanoCode012]

Hey! Thanks for PR. Could you run this through the linter also?

[xaviviro]

Hi there, I've run the code through Pylint and made a couple of minor spacing adjustments as suggested by the tool. Please let me know if there's anything else that needs to be addressed for this PR. Thank you!

[NanoCode012]

Leaving this here for reference implementation: https://github.com/lm-sys/FastChat/blob/722ab0299fd10221fa4686267fe068a688bacd4c/fastchat/conversation.py#L169-L178

I find it weird that there's a space before message since I don't see it within their docs, but fschat has it.

https://github.com/THUDM/ChatGLM3/blob/main/PROMPT_en.md

[xaviviro]

You're right, I have copied the code from https://github.com/lm-sys/FastChat/blob/main/fastchat/conversation.py

I've run a train and the fine-tuned model seems to be working incredibly well.

[NanoCode012]

Thank you for the PR!