Add Velero configuration files and update production kustomization

apps/base/velero/kustomization.yaml

@@ -0,0 +1,7 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: velero
+
+resources:
+  - namespace.yaml
+  - repository.yaml

apps/base/velero/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: velero

apps/base/velero/repository.yaml

@@ -0,0 +1,8 @@
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+  name: velero-helm-repo
+  namespace: velero
+spec:
+  interval: 1h
+  url: https://vmware-tanzu.github.io/helm-charts