feat(external-secrets): add test secret store

platform/external-secrets/templates/clustersecretstore.yaml

@@ -0,0 +1,25 @@
+apiVersion: external-secrets.io/v1alpha1
+kind: ClusterSecretStore
+metadata:
+  name: vault
+spec:
+  provider:
+    vault:
+      server: http://vault.vault:8200
+      path: secret
+      auth:
+        tokenSecretRef:
+          name: vault-token
+          namespace: vault
+          key: token
+        # TODO switch to kubernetes auth
+        # kubernetes:
+        #   mountPath: "kubernetes"
+        #   role: "demo"
+        #   serviceAccountRef:
+        #     name: "my-sa"
+        #     namespace: "secret-admin"
+        #   secretRef:
+        #     name: "my-secret"
+        #     namespace: "secret-admin"
+        #     key: "vault"