feat: add csi-driver-nfs addon (#837)

template/templates/addons/csi-driver-nfs/app/storageclass.yaml.j2

@@ -0,0 +1,15 @@
+#jinja2: trim_blocks: True, lstrip_blocks: True
+{% for item in csi_driver_nfs.storage_class %}
+---
+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  name: {{ item.name }}
+provisioner: nfs.csi.k8s.io
+parameters:
+  server: {{ item.server }}
+  share: {{ item.share }}
+reclaimPolicy: Delete
+volumeBindingMode: Immediate
+mountOptions: ["hard", "noatime"]
+{% endfor %}