⚡️(e2e) add workers to playwright with CI

We have added workers to playwright to run tests in parallel,
this will help us to run tests faster.
The tests run on a commun database, so to keep the tests
stable between browsers, we created 3 different
users to run the tests, it will avoid to have commun data
stepping on each other.

src/frontend/apps/e2e/__tests__/app-desk/header.spec.ts

@@ -2,9 +2,9 @@ import { expect, test } from '@playwright/test';
 
 import { keyCloakSignIn } from './common';
 
-test.beforeEach(async ({ page }) => {
+test.beforeEach(async ({ page, browserName }) => {
   await page.goto('/');
-  await keyCloakSignIn(page);
+  await keyCloakSignIn(page, browserName);
 });
 
 test.describe('Header', () => {