Disable kafka consumers for production

This MR makes it so production doesn't even try to include the kafka consumers in the bootstep. This is only temporary for the upcoming ER15-public-alerts release. We're waiting on MRs that actually use the kafka consumers to get merged, so we haven't been able to test the consumers that extensively. Additionally, the test topics don't exist yet on the test broker, so the kafka worker on playground just tries to set up the consumers and then moves on after it fails. However, the topics exist on the production kafka broker, so the kafka worker on production would actually run the consumers. Since we haven't had really any time on playground with the consumers actually running, this is bit of the code we just haven't tested enough to trust to run on production right now.