move k8s cluster data to its own dir

kubernetes/clusters/production/infrastructure.yaml

@@ -0,0 +1,14 @@
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: infrastructure
+  namespace: flux-system
+spec:
+  interval: 10m0s
+  sourceRef:
+    kind: GitRepository
+    name: flux-system
+  path: ./infrastructure
+  prune: true
+  wait: true