Record the assigned port in the virtualcluster

[qiuwei68]

What would you like to be added:
when the api server port is allocated，the port should record in virtualcluster
Why is this needed:
configmap is used to store data, but it maintains the relationship between ports and virtual control plane. If someone modifies the configmap manually, the relationship between ports and virtual control plane will be confused

[qiuwei68]

/assign