underlay subnet has an unexpected policy route

[changluyi]

Expected Behavior

no policy route below on ovn-cluster
29000 ip4.src == $ovn.default.kube.ovn.control.plane_ip4 reroute 100.64.0.2
29000 ip4.src == $ovn.default.kube.ovn.worker_ip4 reroute 100.64.0.3

Actual Behavior

it has the policy route

Steps to Reproduce the Problem

1. build a kind test env
   make kind-init-dual && make kind-install-underlay-logical-gateway-dual
2. restart kube-ovn-controller
3. it generates an unexpected policy route below
   kubectl-ko nbctl lr-policy-list ovn-cluster
   29000 ip4.src == $ovn.default.kube.ovn.control.plane_ip4 reroute 100.64.0.2
   29000 ip4.src == $ovn.default.kube.ovn.worker_ip4 reroute 100.64.0.3

Additional Info

• Kubernetes version:

  Output of kubectl version:

master branch kind env

• kube-ovn version:

master branch

• operation-system/kernel version:

  Output of awk -F '=' '/PRETTY_NAME/ { print $2 }' /etc/os-release:
  Output of uname -r:

  (paste your output here)