[installer]: remove the custom labels from the selector labels

Author: Simon Emms

install/installer/cmd/testdata/render/customization/config.yaml

@@ -0,0 +1,14 @@
+# Copyright (c) 2022 Gitpod GmbH. All rights reserved.
+# Licensed under the MIT License. See License-MIT.txt in the project root for license information.
+
+apiVersion: v1
+domain: customization-test.gitpod.com
+customization:
+  - apiVersion: "*"
+    kind: "*"
+    metadata:
+      name: "*"
+      labels:
+        hello: world
+      annotations:
+        hello: world