fix(test-runner): warn users who invoke the test-runner with Jest - #7743

 FAIL  tests/foo.spec.js
  ● Test suite failed to run

    test() can only be called in a test file

      1 | const { test, expect } = require('@playwright/test');
      2 |
    > 3 | test('basic test', async ({ page }) => {
        | ^
      4 |   await page.goto('https://playwright.dev/');
      5 |   const name = await page.innerText('.navbar__title');
      6 |   expect(name).toBe('Playwright');

      at Object.<anonymous> (tests/foo.spec.js:3:1)