Feature request

I would like to have more control over grpo generation hyperparameters.
currently GRPOConfig allows only some of the features for the generations: e.g. temp, top_k, top_p, repetition_penalty and maybe some others.
The code overrides generation_config that the model uses, which means that it is not possible to change the models config to get the desired affect.

Motivation

This could give more flexibility when training using the trainer. e.g. we may want to supress some tokens when generating but it is currently not possible to do this

Your contribution

I might be able to help at a later date. so if someone would like to help, it will be great