deploy: add fsgrouppolicy to the driver yaml

this fsgrouppolicy setting was missing in api/deploy/* which
caused the yamlgen to not pickup this. this commit address the
same.

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

api/deploy/kubernetes/nfs/csidriver.yaml

@@ -5,5 +5,6 @@ metadata:
   name: "{{ .Name }}"
 spec:
   attachRequired: false
+  fsGroupPolicy: File
   volumeLifecycleModes:
     - Persistent

api/deploy/kubernetes/rbd/csidriver.yaml

@@ -6,3 +6,4 @@ metadata:
 spec:
   attachRequired: true
   podInfoOnMount: false
+  fsGroupPolicy: File