Write E2E test using terraform

[chrisseto]

A major consumer of our APIs utilize terraform's kubernetes_manifest provider. We know that the current RedPanda CRD doesn't get along with it particularly well due to the usage of preserveUnknownFields. As we'll inevitably need to make changes to our CRDs over time, we should make some E2E test cases to verify the safety of various operations.

This can also serve as a form of documentation that showcases how to utilize our CRDs with terraform. In particular, having working examples of how to use wait will likely save a lot of heartache.

JIRA Link: K8S-204