feat: update manifests and namespaces to use templated namespace variables

node-feature-discovery/kustomization.yaml

@@ -1,6 +1,6 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
-namespace: node-feature-discovery
+namespace: "{{ .namespace }}"
 labels:
   - pairs:
       app.kubernetes.io/name: node-feature-discovery