Fix IP Port Mapping overwritten by new LBs in the same VPC #19989

Job	Run time
Build E2E Binaries	19s
Build kube-ovn-base	4s
Build kube-ovn-dpdk-base	7s
Build vpc-nat-gateway	38s
Network Policy Path Filter	-1s
Build kube-ovn	3m 59s
OVN IPSEC E2E CERT MANAGER	0s
Kube-OVN Connectivity E2E	0s
Webhook E2E	0s
Kube-OVN CNP Domain E2E	0s
Kube-OVN IC Conformance E2E	0s
Installation Compatibility Test	0s
Kube-OVN ANP Domain E2E	0s
Kubernetes Network Policy E2E	0s
Cilium Chaining E2E	0s
Iptables VPC NAT Gateway E2E	0s
Cyclonus Network Policy E2E	0s
OVN VPC NAT Gateway E2E	0s
Kube-OVN HA E2E	0s
Disable OVN LB Test	0s
LB Service E2E	0s
Kube-OVN Conformance E2E	0s
Multus Conformance E2E	0s
OVN METALLB E2E	0s
Kubernetes Conformance E2E	0s
VPC Egress Gateway E2E	0s
Kube-OVN Submariner Conformance E2E	0s
Non-Primary CNI E2E	0s
Chart Installation/Uninstallation Test	0s
Underlay Logical Gateway Installation Test	0s
Push Images	0s
Talos Installation Test	0s
Disable Network Policy Test	0s
OVN IPSEC E2E	0s
	5m 6s

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