chore(logging): Disable info logging of critters in production (#62776)
Critters uses the `info` logLevel by default. This means that when you
enable the experimental `optimizeCss` property, your production logs
will be polluted with their logs
This sets the log level to warn by default in production, and allows
configuration via an environment variable

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Co-authored-by: JJ Kasper <jj@jjsweb.site>