feat: 🎸 move COMMON_LOG_LEVEL to LOG_LEVEL
This allows to define LOG_LEVEL without having to define other "common" variables like HF_ENDPOINT and HF_TOKEN

Required by https://github.com/huggingface/datasets-server/issues/994
feat: 🎸 move COMMON_LOG_LEVEL to LOG_LEVEL: This allows to define LOG_LEVEL without having to define other "common" variables like HF_ENDPOINT and HF_TOKEN

Required by https://github.com/huggingface/datasets-server/issues/994