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Upgrade/Downgrade and Scale Up/Down of a CockroachDB cluster on Kubernetes

Continuing my learning CockroachDB on Kubernetes set from: https://www.youtube.com/playlist?list=PLXLn7kWePxogHwBhY5DmATD8xUHoXEV1r I take some DBAs through: * Patching of CockroachDB * Adding more nodes to a CockroachDB to scale up * Decommissioning nodes to safely scale down a CockroachDB cluster. This builds on the great instructions from Alex Robinson (https://gist.github.com/a-robinson): * https://www.youtube.com/watch?v=7P-nWJgqP7U * https://gist.github.com/a-robinson/173ae84e906d10d25a58f1b26c38066b