[BUG] yurtctl revert should delete cm yurt-tunnel-nodes

[Congrool]

What happened:
When using yurtctl revert to revert the yurt cluster back to a kubernetes cluster, it seems that it will not delete the configmap yurt-tunnel-nodes which is used by yurt-tunnel to resolve dns.
We can find the configmap yurt-tunnel-nodes after reversion.

root@openyurt-e2e-test-control-plane:~/openyurt# kubectl get cm -A
NAMESPACE            NAME                                 DATA   AGE
default              kube-root-ca.crt                     1      50m
kube-node-lease      kube-root-ca.crt                     1      50m
kube-public          cluster-info                         2      50m
kube-public          kube-root-ca.crt                     1      50m
kube-system          coredns                              1      50m
kube-system          extension-apiserver-authentication   6      50m
kube-system          kube-proxy                           2      50m
kube-system          kube-root-ca.crt                     1      50m
kube-system          kubeadm-config                       2      50m
kube-system          kubelet-config-1.20                  1      50m
kube-system          yurt-tunnel-nodes                    1      43m
kube-system          yurtctl-lock                         0      46m
local-path-storage   kube-root-ca.crt                     1      50m
local-path-storage   local-path-config                    1      50m

What you expected to happen:
yurtctl should delete yurt-tunnel-nodes when yurt-tunnel has been deployed through yurtctl convert --deploy-yurttunnel

How to reproduce it (as minimally and precisely as possible):
Use yurtctl convert --deploy-yurttunnel to convert the k8s cluster to openyurt cluster and then use yurtctl revert to revert it back to the k8s cluster.

others
We can also find configmap yurtctl-lock left in the cluster. Does it need to be deleted as well?

/kind bug

[rambohe-ch]

@Congrool Thank you for raising issue.
I think these two configmaps should be removed after yurtctl revert, would you like to take over and fix this bug?

[Congrool]

@Congrool Thank you for raising issue. I think these two configmaps should be removed after yurtctl revert, would you like to take over and fix this bug?

Sure.

[rambohe-ch]

/assign @Congrool