Add tests for trustee-operator

[bpradipt]

At least the following initial tests will be needed

• operator install and uninstall
• Trustee CRD creation, deletion
• secret release
• policy check (deny secret release due to policy deny)
• policy check (allow secret release due to policy allow)
• Update config, secret or policy via modifying the related K8s resources and verifying the update is reflected in the Trustee components
• scaling trustee pods and verifying secret release, policy checks, config updatesetc

[bpradipt]

Some options to explore

https://github.com/confidential-containers/operator/tree/main/tests/e2e https://kuttl.dev/docs/#pre-requisites https://kyverno.github.io/chainsaw/latest/