Revise require imports (#3071)

- order (external first)
- remove superfluous file extensions
- new line after imports
- deconstruct (only one time (in `check_config.js`))
- fix path (only one time (in `global-setup.js`))

tests/e2e/translations_spec.js

@@ -1,10 +1,10 @@
 const fs = require("fs");
 const path = require("path");
-const translations = require("../../translations/translations.js");
 const helmet = require("helmet");
 const { JSDOM } = require("jsdom");
 const express = require("express");
 const sinon = require("sinon");
+const translations = require("../../translations/translations");
 
 describe("Translations", () => {
 	let server;