Fix upgrade tests

Author: sunu

dev-config-local-chart-extra-config.yaml

@@ -8,3 +8,14 @@
 # include this config and then pass --set hub.some-option=null to null it out
 # when it must not be passed, but that still triggers schema validation errors.
 #
+
+singleuser:
+  storage:
+    extraVolumes:
+      test-volume:
+        name: test-volume
+        emptyDir: {}
+    extraVolumeMounts:
+      test-volume-mount:
+        name: test-volume
+        mountPath: /test-volume

dev-config.yaml

@@ -159,14 +159,6 @@ singleuser:
     data-toml: *data-toml
   storage:
     type: none
-    extraVolumes:
-      test-volume:
-        name: test-volume
-        emptyDir: {}
-    extraVolumeMounts:
-      test-volume-mount:
-        name: test-volume
-        mountPath: /test-volume
   memory:
     guarantee: null
   networkPolicy: