Fix e2e test RBAC: add bind/escalate verbs

Scoped ServiceAccount clients need `bind` and `escalate` verbs
to create ClusterRoleBindings. The admin client previously used
bypassed this RBAC requirement.

Author: camilamacedo86

test/e2e/steps/testdata/rbac-template.yaml

@@ -50,7 +50,7 @@ rules:
       - roles
       - clusterrolebindings
       - rolebindings
-    verbs: [ update, create, list, watch, get, delete, patch ]
+    verbs: [ update, create, list, watch, get, delete, patch, bind, escalate ]
   - apiGroups: ["coordination.k8s.io"]
     resources: ["leases"]
     verbs: [ update, create, list, watch, get, delete, patch ]