Add new crd to convert kubesphere network policy to k8s network policy, and then other network
plugin will do the rest work.

Use  cache.go from calico project's kube-controller,  it aim to  sync nsnp with k8s np, delete unused np, and relieve the pressure on k8s restful client.

If you want higher performance, you can implement interface  NsNetworkPolicyProvider in pkg/controller/provider/namespace_np.go.
Signed-off-by: NDuan Jiong <djduanjiong@gmail.com>