LitProgressBar ignores TQDM MINITERS

LitProgressBar ignores TQDM MINITERS: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). Bug description tqdm supports setting the environment variable TQDM MINITERS to reduce the frequency of progress bar updates. Since lightning trainer defaults to a TQDM progress bar, I…