Use functional parameters in Controller creation

[dzlier-gcp]

The constructor for Controller in controller.go is becoming unwieldy and has the potential to be error-prone as more parameters are added.

Go makes use of functional parameters in a similar way that some other languages use Builders. We should consider doing so as well to help readability as more developers start working on the project.

[markmandel]

Is there a way we can tie default values from the cmd section back to default values in the controller (or vice versa).

My only issue I have with doing this is that we could have default values set in two places, with different default values, which is potentially error prone.

If we can solve this issue, I'm all for it. (It may also lead to a nice pattern in cmd, because the huge list of flags is also really long and not that nice either)

[markmandel]

Any objections to me closing this issue? Looks like the pattern we have now solves this for the moment?

[markmandel]

Going to close this, sounds like it's not an issue anymore.

Please re-open as needed.