Description of problem: After upgrade a cluster from non-UDN 4.17 image to 4.18 pre-merge EIP+UDN image, "oc wait UserDefinedNetwork/<udn_name>  -n <ns> --for condition=NetworkAllocationSucceeded=True" would hang returning no result

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

How reproducible:

Steps to Reproduce:

1.  Build a cluster with non-UDN 4.17 nightly image

2.  Upgrade the cluster to a 4.18 UDN image (I used a pre-merge image built from openshift/api#1997,  openshift/ovn-kubernetes@2333, that has EIP with UDN enabled)

3. Create a new UDN, check if UDN is successfully applied with oc wait UserDefinedNetwork/<udn_name>  -n <ns> --for condition=NetworkAllocationSucceeded=True" 

Actual results:  The command would hang, does not return any value, this only happens to cluster that was upgraded from non-UDN image to UDN image.   A freshly created cluster with UDN image directly does not have such a problem.

Expected results: The command should return value to indicate the UDN is applied successfully or not.