[FEATURE] Provide an option to test/render before attempting to boot nodes

[alexlovelltroy]

This may be an ochami issue.

This may be a configurator issue.

We may need to create a container for running an isolated cloud-init instance with curated data.

🤷

[synackd]

Rendering per-node configuration based on the group it is in was added to ochami v0.2.0.