feat: update manifests and namespaces to use templated namespace variables

snapshot-controller/manifest.yaml

@@ -2,6 +2,7 @@ name: snapshot-controller
 is: snapshot-controller
 description: Kubernetes CSI Snapshot Controller for managing VolumeSnapshots
 version: v8.1.0
-namespace: kube-system
 deploymentName: snapshot-controller
 category: infrastructure
+defaultConfig:
+  namespace: kube-system