find other names for the same node

    usage: fx node-names HOSTNAME

    Prints other names a node may have had based on the generated hostnames.
    hostname can be:
      -  a gen 1 name like fs-0123-4567-89ab

    Gen 0 names (step-atom-yard-juicy) aren't forward-mappable into new name.

[node-names source code](https://cs.opensource.google/fuchsia/fuchsia/+/main:tools/devshell/node-names)