Fix "netchecker-server" ClusterRole (#4730)

* Add sha256 hashes for calicoctl v3.6.1

Hashes are added to calicoctl_binary_checksums for both adm and arm platforms.

* Add rules for "network-checker.ext" resource to "netchecker-server" ClusterRole

So that it could access the resource after it is created.

Corresponding issues:
https://github.com/Mirantis/k8s-netchecker-server/issues/125
https://github.com/kubernetes-sigs/kubespray/issues/3281

roles/kubernetes-apps/ansible/templates/netchecker-server-clusterrole.yml.j2

@@ -10,3 +10,6 @@ rules:
   - apiGroups: ["apiextensions.k8s.io"]
     resources: ["customresourcedefinitions"]
     verbs: ['*']
+  - apiGroups: ["network-checker.ext"]
+    resources: ["agents"]
+    verbs: ['*']