1. Proposed title of this feature request
Adding the use of regular expression based selector in ANP/BANP resources to select a set of namespace for spec.subject field.

2. What is the nature and description of the request?
The customer need to apply the ingress/egress rules defined in ANP/BANP to a set of namespaces. They want to exclude all these namespace openshift-* and kube-* from the ANP/BANP resource spec.subject definition.

3. Why does the customer need this? (List the business requirements here)
Currently, the customer is excluding these namespaces (openshift-* and kube-*) by listing all the namespaces name in spec.subject.namespaces.matchExpressions.values

spec:
  subject:
    namespaces:
      matchExpressions:
        - key: kubernetes.io/metadata.name
          operator: NotIn
          values:
            - {list of all project starting with openshift-* and kube-*} 

4. List any affected packages or components.