Make task_cost_check test resilient to changes in order (elastic#20…

…4045)

## Summary

Addresses failures such as
https://buildkite.com/elastic/kibana-pull-request/builds/259739#0193bb07-c759-4749-965e-10e63ac0810a.

We believe the order in which task types are registered might have been
affected by the relocation of the
`@kbn/observability-ai-assistant-app-plugin` in the scope of
_Sustainable Kibana Architecture_.

x-pack/plugins/task_manager/server/integration_tests/task_cost_check.test.ts

@@ -12,6 +12,7 @@ import {
 import { TaskCost, TaskDefinition } from '../task';
 import { setupTestServers } from './lib';
 import { TaskTypeDictionary } from '../task_type_dictionary';
+import { sortBy } from 'lodash';
 
 jest.mock('../task_type_dictionary', () => {
   const actual = jest.requireActual('../task_type_dictionary');
@@ -50,14 +51,17 @@ describe('Task cost checks', () => {
 
   it('detects tasks with cost definitions', async () => {
     const taskTypes = taskTypeDictionary.getAllDefinitions();
-    const taskTypesWithCost = taskTypes
-      .map((taskType: TaskDefinition) =>
-        !!taskType.cost ? { taskType: taskType.type, cost: taskType.cost } : null
-      )
-      .filter(
-        (tt: { taskType: string; cost: TaskCost } | null) =>
-          null != tt && tt.cost !== TaskCost.Normal
-      );
+    const taskTypesWithCost = sortBy(
+      taskTypes
+        .map((taskType: TaskDefinition) =>
+          !!taskType.cost ? { taskType: taskType.type, cost: taskType.cost } : null
+        )
+        .filter(
+          (tt: { taskType: string; cost: TaskCost } | null) =>
+            null != tt && tt.cost !== TaskCost.Normal
+        ),
+      'taskType'
+    );
     expect(taskTypesWithCost).toMatchSnapshot();
   });
 });