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>