REFACTOR(code-server): migrate code-server namespa

- Update namespace in all manifests (ingress, rbac, vault, argocd)
- Add namespace field to kustomization.yaml
- PVC will be recreated in new namespace with name 'code-server'
- All resources will be migrated to code-server namespace

code-server/rbac.yaml

@@ -9,5 +9,5 @@ roleRef:
 subjects:
 - kind: ServiceAccount
   name: code-server
-  namespace: dev-tools
+  namespace: code-server