CLI: Refactor kubectl calls

[Dunky13]

Would like to refactor all kubectl calls ($'kubectl ' - where ' is a backtick) to use a kubectl nodejs library and be more node/JS native, and even less reliant on bash.

[dominikatrela]

@Dunky13 is this still relevant?

[Dunky13]

Potentially yes. It depends on whether or not we refactor the entrypoint redkubes/unassigned-issues#249 If we do, the kubectl calls will be different anyway