feat: 🎸 Refactor managed-groups to managed-group

Refactor naming from managed-groups to managed-group

addons/api/mirage/factories/managed-group.js

@@ -1,11 +1,11 @@
-import factory from '../generated/factories/managed-groups';
+import factory from '../generated/factories/managed-group';
 import permissions from '../helpers/permissions';
 
 export default factory.extend({
   id: (i) => `managed-groups-id-${i}`,
 
   authorized_actions: () =>
-    permissions.authorizedActionsFor('managed-groups') || [
+    permissions.authorizedActionsFor('managed-group') || [
       'no-op',
       'read',
       'update',

addons/api/mirage/generated/factories/managed-group.js

@@ -2,7 +2,7 @@ import { Factory } from 'ember-cli-mirage';
 import { random, date, datatype } from 'faker';
 
 /**
- * GeneratedManagedGroupsFactory
+ * GeneratedManagedGroupFactory
  * A managed group is a resource that represents a collection of accounts.
  */
 export default Factory.extend({