[bugfix] Optimize node gc method

[cmdy]

Pull Request

• Make sure you have followed Kube-OVN Code Style.

What type of this PR

Examples of user facing changes:

• Bug fixes

Which issue(s) this PR fixes

Fixes #(issue-number)

1. When the controller is stopped, the node is deleted, and then the controller is restarted, the logical router policy with a priority of 29000 is not properly cleared.
   
2. Although ovn-controller will skip the error in the picture, it will cause some retries，this causes the ovn-controller to start slowly and the flow table information to be delivered slowly in a large-scale cluster(2000+ node,15w+ pod,100+ subnet).
3. fix kube-ovn-cni crash for newly added nodes , due to old legacy event #4194 This PR caused the node deletion logic in the gc node to not be actually executed.

[oilbeater]

@cmdy the u2o e2e failed. Seems like some policy rules get lost.

[cmdy]

@cmdy the u2o e2e failed. Seems like some policy rules get lost.

In release-1.12, e2e test file not found, what should I do to pass the check

[oilbeater]

It has been backport in b23c8da