Fix CODE level usage in dynamo config.py (#87522)
Fixes https://github.com/pytorch/torchdynamo/issues/1718.
Tested by changing `log_level = logging.WARNING` in config.py to `log_level = logging.CODE` and running a test script that doesn't touch `log_level`.
cc @jansel @lezcano @fdrocha @mlazos @soumith @voznesenskym @yanboliang @penguinwu @anijain2305
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87522
Approved by: https://github.com/mlazos
