Add dns entries for all hosts from the inventory file

[mkarg75]

As of now, JetSki only creates dns entries for the nodes that are being used during the installation. For later scale outs it's required to parse the inventory file again and create the remaining dns entries for dnsmasq. It'd be good if that could be done during the installation already, possible with a switch that defaults to off if that is not a common usecase.

[smalleni]

@jaredoconnell Would you like to work on this? I can give you a quick walthrough of what needs to happen, if you are interested.

[jaredoconnell]

@smalleni That seems like a good task once I finish my current task.

[github-actions]

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