E2E/Playwright: Instantiate page in pw (#29765)

* instantiate page in pw

* update spec

* fix storage key and require user when logging in via API

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

e2e-tests/playwright/tests/visual/common/landing_page.spec.ts

@@ -3,11 +3,10 @@
 
 import {test} from '@e2e-support/test_fixture';
 
-test('/landing#/login', async ({pw, pages, page, isMobile, browserName, viewport}, testInfo) => {
+test('/landing#/login', async ({pw, page, browserName, viewport}, testInfo) => {
     // Go to landing login page
-    const landingLoginPage = new pages.LandingLoginPage(page, isMobile);
-    await landingLoginPage.goto();
-    await landingLoginPage.toBeVisible();
+    await pw.landingLoginPage.goto();
+    await pw.landingLoginPage.toBeVisible();
 
     // Match snapshot of landing page
     await pw.matchSnapshot(testInfo, {page, browserName, viewport});