Kubernetes config state updates (#19074)

* hides roles toolbar actions when k8s is not configured

* adds error page component to core addon

* moves fetch-config to decorator

* updates kubernetes prompt config logic

* adds kubernetes error route

* fixes tests

* adds error handling for kubernetes roles list view

* removes unneeded arg to withConfig decorator

ui/lib/kubernetes/addon/routes/configuration.js

@@ -1,7 +1,17 @@
-import FetchConfigRoute from './fetch-config';
+import Route from '@ember/routing/route';
+import { inject as service } from '@ember/service';
+import { withConfig } from '../decorators/fetch-config';
+
+@withConfig()
+export default class KubernetesConfigureRoute extends Route {
+  @service store;
+  @service secretMountPath;
 
-export default class KubernetesConfigureRoute extends FetchConfigRoute {
   model() {
+    // in case of any error other than 404 we want to display that to the user
+    if (this.configError) {
+      throw this.configError;
+    }
     return {
       backend: this.modelFor('application'),
       config: this.configModel,