Merge pull request #7761 from carlbraganza/add-csi-snapshot-metadata-image

Added the csi-snapshot-metadata image.

Author: k8s-ci-robot

registry.k8s.io/images/k8s-staging-sig-storage/generate.sh

@@ -29,6 +29,7 @@ readonly images=(
     csi-node-driver-registrar
     csi-provisioner
     csi-resizer
+    csi-snapshot-metadata
     csi-snapshotter
     hello-populator
     hostpathplugin