Setup tests across multiple versions of kubernetes

[mjpitz]

To ensure our deployment configuration works across multiple versions of kubernetes, we should set up some tests to ensure the deployment configuration applies cleanly. We should be able to do this pretty easily with Github actions and a matrix. Take a look here to see how I did this with tracker across storage providers. The test doesn't have to do anything fancy to start, just cleanly bring up the system using the new deployment configuration.

https://github.com/depscloud/depscloud/blob/main/.github/workflows/tracker-integration.yaml#L23-L30

Versions to test: 1.16, 1.17, 1.18, 1.19 (should eventually build in a support model)

Tests should only be run if the charts change.

I can help point someone the right way on this once they get started.