Iterate over verifySteadyStateCmd

[ChrisKujawa]

Instead of having zbchaos verify steady-state which does multiple things (deploy a model, create an instance or ONLY create instance for a specific version) we should replace that and use zbchaos deploy and and command to create an instance on a specific partition in order to verify our steady state.

This would mean we rename the subcommand for example to zbchaos verify instance-creation or something else, and remove the deploy logic.

Then everything does exactly one thing and it can easily combined or omitted (deployment). I think it makes the usage clearer.

Also related to @oleschoenburg review comment #246 (comment)