EgressIP is not getting assigned to nodes in AWS cluster

Issue

• The EgressIPs are not getting assigned to the nodes.
• This issue is seen in cluster with OVNKubernetes as CNI in AWS platform.
• Label k8s.ovn.org/egress-assignable is already assigned to nodes but EgressIP does not get assigned to any node.

• Below errors can be seen in openshift-cloud-network-config-controller pod logs:

  2024-07-12T00:35:34.141994123Z I0712 00:35:34.141957       1 controller.go:182] Assigning key: 10.xx.xx.x to cloud-private-ip-config workqueue
  2024-07-12T00:35:34.145773388Z I0712 00:35:34.145743       1 cloudprivateipconfig_controller.go:357] CloudPrivateIPConfig: "10.xx.xx.x" will be added to node: "ip-10-xx-xx-xx.ec2.internal"
  2024-07-12T00:35:34.152765838Z I0712 00:35:34.152742       1 controller.go:182] Assigning key: 10.xx.xx.x to cloud-private-ip-config workqueue
  2024-07-12T00:35:34.153008282Z I0712 00:35:34.152971       1 cloudprivateipconfig_controller.go:381] Adding finalizer to CloudPrivateIPConfig: "10.xx.xx.x"
  2024-07-12T00:35:34.687729288Z E0712 00:35:34.687641       1 aws.go:121] error: InvalidParameterValue: [10.xx.xx.x] assigned, but move is not allowed.
  2024-07-12T00:35:34.687729288Z     status code: 400, request id: a4b09235-f20c-401e-a8e0-81bfadb30965, tried to assign IP '10.xx.xx.x' to interface: {
  2024-07-12T00:35:34.943199257Z E0712 00:35:34.943139       1 controller.go:165] error syncing '10.xx.xx.x': error assigning CloudPrivateIPConfig: "10.xx.xx.x" to node: "ip-10-xx-xx-xx.ec2.internal", err: InvalidParameterValue:    [10.xx.xx.x] assigned, but move is not allowed.