move ee-specific files into the ee namespace

app/assets/javascripts/pages/projects/clusters/show/index.js

 import ClustersBundle from '~/clusters/clusters_bundle';
-import initClusterHealth from './cluster_health';
 
 document.addEventListener('DOMContentLoaded', () => {
   new ClustersBundle(); // eslint-disable-line no-new
-  initClusterHealth();
 });

ee/app/assets/javascripts/pages/projects/clusters/show/index.js

+import '~/pages/projects/clusters/show';
+import initClusterHealth from './cluster_health';
+
+document.addEventListener('DOMContentLoaded', initClusterHealth);