clusternet-agent sa need clusterrole permission

[hustcat]

What happened:

clusternet-agent error log:

W0901 02:45:02.131938       1 status_manager.go:124] cluster status is not ready, will retry later
W0901 02:45:02.649602       1 status_manager.go:124] cluster status is not ready, will retry later
W0901 02:45:05.366810       1 status_manager.go:124] cluster status is not ready, will retry later
I0901 02:45:10.403261       1 reflector.go:255] Listing and watching *v1.Node from pkg/mod/k8s.io/client-go@v0.21.2/tools/cache/reflector.go:167
E0901 02:45:10.404607       1 reflector.go:138] pkg/mod/k8s.io/client-go@v0.21.2/tools/cache/reflector.go:167: Failed to watch *v1.Node: failed to list *v1.Node: nodes is forbidden: User "system:serviceaccount:clusternet-system:clusternet-agent" cannot list resource "nodes" in API group "" at the cluster scope
W0901 02:45:19.086087       1 status_manager.go:124] cluster status is not ready, will retry later

The clusternet-agent sa need clusterrole permission.

[dixudx]

This is still a new feature to be released into v0.4.0. Thanks for trying newest feature.

Will be fixed in #98.