Cogctl should not fall back to installing from warehouse when a config file exists but fails validation

[vanstee]

If you try to install a bundle from a local config file like bundle install config.yaml and that config file has a validation error, cogctl will return ERROR: nil. The main problem is that if schema validation fails, even if the config exists, we still fallback to check warehouse for a bundle named config.yaml, let's fix that bug so that it fails at schema validation and properly returns the schema related errors.