Implement Kyverno policy testing with kyverno-test.yaml manifests in CI

Steps

1. Install the Kyverno CLI via `brew install kyverno` or the official release binary; verify with `kyverno version`.
2. Create a `tests/` directory containing: the policy YAML file, sample resource YAML files (compliant and non-compliant), and a `kyverno-test.yaml` manifest.
3. In `kyverno-test.yaml` define the `policies` list pointing to the policy file, `resources` list pointing to sample resource files, and `results` list declaring expected `pass` or `fail` outcomes per policy-rule-resource combination.
4. Run `kyverno test tests/` from the repo root; the CLI compares declared results to actual evaluations and exits non-zero if any result mismatches.
5. Add the `kyverno test` step to CI (GitHub Actions, GitLab CI, etc.) before any cluster deployment step to catch policy logic errors in the PR review phase.
6. Use `kyverno test tests/ -v 5` for verbose output that shows per-rule evaluation details when debugging failing tests.