[RHOCP 4] Unassigned namespaces are using EgressIP when configured with matchExpression.

Issue

• When configuring EgressIP using matchExpressions unassigned namespaces are using EgressIP.

  apiVersion: k8s.ovn.org/v1
  kind: EgressIP
  metadata:
  name: egress-matchexpression
  spec:
  egressIPs:
  - A.A.A.A
  namespaceSelector:
    matchExpressions:                               
    - key: kubernetes.io/metadata.name
      operator: In
      values:
      - egress-test