refactor: organize imports inside tests files (#4542)

Co-authored-by: Alexandr <qwerty541zxc@gmail.com>

backend/tests/fetchStats.test.js

@@ -1,9 +1,9 @@
+import { afterEach, beforeEach, describe, expect, it } from "@jest/globals";
 import "@testing-library/jest-dom";
 import axios from "axios";
 import MockAdapter from "axios-mock-adapter";
 import { calculateRank } from "../src/calculateRank.js";
 import { fetchStats } from "../src/fetchers/stats.js";
-import { expect, it, describe, beforeEach, afterEach } from "@jest/globals";
 
 // Test parameters.
 const data_stats = {