Improves RTL configuration (#13079)

- Adds plugin:jest-dom/recommended to ESLint plugins list to enforce tests best practices

- Moves import @testing-library/jest-dom/extend-expect; from setup.ts to testing-library.tsx to avoid matchers collision

- Adds @testing-library/user-event to help simulate users events

superset-frontend/.eslintrc.js

@@ -167,11 +167,20 @@ module.exports = {
         'src/**/*.test.js',
         'src/**/*.test.jsx',
       ],
-      plugins: ['jest', 'jest-dom', 'no-only-tests'],
+      plugins: ['jest', 'jest-dom', 'no-only-tests', 'testing-library'],
       env: {
         'jest/globals': true,
       },
-      extends: ['plugin:jest/recommended', 'plugin:testing-library/react'],
+      settings: {
+        jest: {
+          version: 'detect',
+        },
+      },
+      extends: [
+        'plugin:jest/recommended',
+        'plugin:jest-dom/recommended',
+        'plugin:testing-library/react',
+      ],
       rules: {
         'import/no-extraneous-dependencies': [
           'error',