[CLI-2332] Add --availability and --type to kafka cluster update

[brianstrauch]

Checklist

1. [CRUCIAL] Is the change for features that are already live in prod?
   • yes: ok

What

• Update a dedicated cluster to multi-zone with kafka update --availability multi-zone
• Update a basic/standard cluster to multi-zone with kafka update --availability multi-zone --type dedicated

References

https://confluentinc.atlassian.net/wiki/spaces/KPLATFORM/pages/2928020393/Engineering+One+Pager+Standard+Cluster+Single-Zone+to+Multi-Zone+Migration#CLI-Workflow

Test & Review

Untested, since backend is still a WIP. Planning to write integration tests and system tests.

[tmodi11]

@brianstrauch Thanks for all your work on this! Did a first pass and left some comments.

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}