migrate projects:clusters:* to static bundle

app/assets/javascripts/dispatcher.js

@@ -270,18 +270,6 @@ var Dispatcher;
             .then(callDefault)
             .catch(fail);
           break;
-        case 'projects:clusters:show':
-        case 'projects:clusters:update':
-        case 'projects:clusters:destroy':
-          import('./pages/projects/clusters/show')
-            .then(callDefault)
-            .catch(fail);
-          break;
-        case 'projects:clusters:index':
-          import('./pages/projects/clusters/index')
-            .then(callDefault)
-            .catch(fail);
-          break;
         case 'dashboard:groups:index':
           import('./pages/dashboard/groups/index')
             .then(callDefault)

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

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

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

 import ClustersIndex from '~/clusters/clusters_index';
 
-export default () => {
+document.addEventListener('DOMContentLoaded', () => {
   new ClustersIndex(); // eslint-disable-line no-new
-};
+});

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

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

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

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