WIP: Ability to add/remove node pools from a GKE cluster

[danawillow]

This mostly works, with several large caveats:

• You can't add a node pool in the middle of a list, only at the end
• Name prefixes / empty names don't work as expected
• I haven't written any test cases yet, just manual ones

As such, I'm not looking for feedback now, but putting this out there just as a "hey I'm working on this" PR, and also so that nobody ends up duplicating this work.

The real solution for the first point is to convert node_pool into a set. The rest I could hypothetically fix now, but I'm going to hold off on new changes until node pools are a Set.

[rileykarson]

Is this outdated @danawillow?

[danawillow]

Ah yes very. I'll probably update again later with all the reasons why this is a bad idea, but I'll go ahead and close it for now.

[rileykarson]

Sounds good! #780 is probably a better home for updates, I think you pointed to it from #1712 as well.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

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