As part of the ArgoCD health checks for OperatorPolicy in ACM-12570, we need to know if the compliance message in OperatorPolicy is based on the latest spec for ArgoCD sync waves to work. Let's add a `status.observedGeneration` similar to ConfigurationPolicy's `status.lastEvaluatedGeneration` for the ArgoCD health check to mark the OperatorPolicy as progressing if the current generation doesn't match the `status.observedGeneration`. `status.observedGeneration` is a more common field name in Kubernetes which is why this is the recommended name.