E2E/Playwright: Update dependencies, screenshots, config and type (#23000)

* update dependencies

* update default server config and client type

* close browser context once test is done

* fix test when switching a product

* update screenshots and readme

* add cross-env and make headless mode as default

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

e2e-tests/playwright/support/test_fixture.ts

@@ -18,6 +18,7 @@ export const test = base.extend<ExtendedFixtures>({
     pw: async ({browser}, use) => {
         const pw = new PlaywrightExtended(browser);
         await use(pw);
+        await pw.testBrowser.close();
     },
     // eslint-disable-next-line no-empty-pattern
     pages: async ({}, use) => {