Add `--logging-config` CLI argument which can be supplied as JSON or using dotted arguments. The `--log-level` argument is provided for convenience, and `--log-config-file` is deprecated in favor of `--logging-config.pylogging_config_file`. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Co-authored-by: AI Assistant <noreply@openai.com>