Avoid rendering info log level (#13642)
We were previously rendering messages for the info level, carrying
overhead in pubgrub which using `log::info!`. We avoid this by only
configuring `LevelFilter::INFO` if the durations layer exists.
I've confirmed that the default `Subscriber::max_level_hint` goes from
`INFO` to `OFF` and the profile skips `Incompatibility::display`.
