REFACTOR(vault): move resources to manifests

- Move additional resources to manifests/ folder
- Separate from Helm chart configuration

vault/manifests/external-secret.yaml

@@ -0,0 +1,18 @@
+apiVersion: external-secrets.io/v1
+kind: ExternalSecret
+metadata:
+  name: vault-config
+  namespace: vault
+spec:
+  refreshInterval: 1h
+  secretStoreRef:
+    name: vault-backend
+    kind: ClusterSecretStore
+  target:
+    name: vault-config-secret
+    creationPolicy: Owner
+  data:
+    - secretKey: extraconfig-from-values.hcl
+      remoteRef:
+        key: secret/data/vault/config
+        property: extraconfig-from-values.hcl