Implement parameter for multiple chat templates

[JoJ3o]

Since #6588, some GGUFs contain multiple chat templates. For example: https://huggingface.co/bartowski/c4ai-command-r-08-2024-GGUF?show_file_info=c4ai-command-r-08-2024-Q4_K_M.gguf

But if I understand correctly, nothing was ever implemented to actually select one of these additional chat templates, as it wasn't a priority back then.

Now that a lot of work has been done to chat templates and jinja features this year, is it worth while to look at this feature again?

Ideally I would like a new parameter for the cli and server where you can name one of the other chat templates. For example: "--multi-chat-template {name in tokenizer.chat_templates}". Or you could implement this into the existing --chat-template parameter

[ExtReMLapin]

Met the same issue, not sure how exactly one is picked over the others