fix: use SA created from helm chart for SUC

Signed-off-by: Devin Buhl <devin@buhl.casa>

bootstrap/templates/addons/system-upgrade-controller/app/rbac.yaml.j2

@@ -1,23 +1,8 @@
 ---
-apiVersion: v1
-kind: ServiceAccount
-metadata:
-  name: system-upgrade
-secrets:
-  - name: system-upgrade
----
-apiVersion: v1
-kind: Secret
-type: kubernetes.io/service-account-token
-metadata:
-  name: system-upgrade
-  annotations:
-    kubernetes.io/service-account.name: system-upgrade
----
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
-  name:  system-upgrade
+  name: system-upgrade
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: ClusterRole