Description of problem:

When enabled BGP feature, and create egressip with only one worker.  egressip cannot be assigned to the worker

Version-Release number of selected component (if applicable):

using latest cluster-bot build: build 4.18,openshift/cluster-network-operator#2442,openshift/ovn-kubernetes#2239

4.18.0-0.test-2024-11-28-094148-ci-ln-1k98rjk-latest

How reproducible:

Steps to Reproduce:

1. setup cluster and enable BGP

2. Create egressip and assign one worker

apiVersion: k8s.ovn.org/v1
kind: EgressIP
metadata:
  name: egress-group1
spec:
  egressIPs:
  - 11.131.100.100
  podSelector:
    matchLabels:
      name: test-pods
  namespaceSelector:
    matchLabels:
      env: prod

3.  oc label node worker-2 k8s.ovn.org/egress-assignable=""

4.  check egressip and found it canot be assigned to worker-2

1. oc get egressip
   NAME            EGRESSIPS        ASSIGNED NODE   ASSIGNED EGRESSIPS
   egress-group1   11.131.100.100                   

Actual results:

Expected results:

egressip can be assigned to worker-2

Additional info: