Update snapshot-controller and csi-snapshotter images to v2.0.0-rc2

Author: xing-yang

deploy/kubernetes/csi-snapshotter/setup-csi-snapshotter.yaml

@@ -85,7 +85,7 @@ spec:
               mountPath: /csi
         - name: csi-snapshotter
           # NOTE: replace with official image when released: quay.io/k8scsi/csi-snapshotter:v2.0.0
-          image: csi-snapshotter:testbeta #quay.io/k8scsi/csi-snapshotter:testbeta
+          image: quay.io/k8scsi/csi-snapshotter:v2.0.0-rc2
           args:
             - "--v=5"
             - "--csi-address=$(ADDRESS)"

deploy/kubernetes/snapshot-controller/setup-snapshot-controller.yaml

@@ -20,7 +20,7 @@ spec:
       containers:
         - name: snapshot-controller
           # NOTE: replace with official image when released: quay.io/k8scsi/snapshot-controller:v2.0.0
-          image: snapshot-controller:testbeta #quay.io/k8scsi/snapshot-controller:testbeta
+          image: quay.io/k8scsi/snapshot-controller:v2.0.0-rc2
           args:
             - "--v=5"
             - "--leader-election=false"