Enforce AppProject with clusterResourceBlacklist in CEL expressions

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: appproject-clusterresourceblacklist
  annotations:
    policies.kyverno.io/title: Enforce AppProject with clusterResourceBlacklist in CEL expressions
    policies.kyverno.io/category: Argo in CEL
    policies.kyverno.io/severity: medium
    kyverno.io/kyverno-version: 1.11.0
    policies.kyverno.io/minversion: 1.11.0
    kyverno.io/kubernetes-version: 1.26-1.27
    policies.kyverno.io/subject: AppProject
    policies.kyverno.io/description: An AppProject may optionally specify clusterResourceBlacklist which is a blacklisted group of cluster resources. This is often a good practice to ensure AppProjects do not allow more access than needed. This policy is a combination of two rules which enforce that all AppProjects specify clusterResourceBlacklist and that their group and kind have wildcards as values.
spec:
  validationFailureAction: Audit
  background: true
  rules:
    - name: has-wildcard-and-validate-clusterresourceblacklist
      match:
        any:
          - resources:
              kinds:
                - AppProject
              operations:
                - CREATE
                - UPDATE
      validate:
        cel:
          expressions:
            - expression: has(object.spec.clusterResourceBlacklist)
              message: AppProject must specify clusterResourceBlacklist.
            - expression: object.spec.clusterResourceBlacklist.all(element, element.group.contains('*') && element.kind.contains('*'))
              message: Wildcards must be present in group and kind for clusterResourceBlacklist.