Switch all commands to IOStreams

[soltysh]

/assign @deads2k @juanvallejo

This should go in as soon as the rebase lands, since this is switching all our commands to IOStreams.

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[deads2k]

@soltysh @juanvallejo I picked this with the intent to merge it, but as I was reading, I wondered why wouldn't we tackle this the way we did in kubectl, where the first touch was to start creating the options we needed and iterate through the commands so we didn't need to re-touch them every time. This plumbs an arg, but then it effectively hides those which use it properly and those which don't.

[deads2k]

@soltysh promised to make his future pulls establish options structs. I'm going to hold future pulls to that standard.

/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: deads2k, soltysh

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[deads2k]

wide breadth, requested (and denied) to come in with the rebase, work is stacked up behind it, bumping priority.