Replace kube object menu registry with reactive solution (#4731)

Co-authored-by: Sebastian Malton <sebastian@malton.name>

__mocks__/monaco-editor.ts

@@ -0,0 +1,5 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+export default {};