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

* instantiate page in pw

* update spec

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

---------

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

e2e-tests/playwright/tests/accessibility/channels/intro_channel.spec.ts

@@ -3,15 +3,14 @@
 
 import {expect, test} from '@e2e-support/test_fixture';
 
-test.fixme('Base channel accessibility', async ({pw, pages, axe}) => {
+test.fixme('Base channel accessibility', async ({pw, axe}) => {
     // # Create and sign in a new user
     const {user} = await pw.initSetup();
 
     // # Log in a user in new browser context
-    const {page} = await pw.testBrowser.login(user);
+    const {page, channelsPage} = await pw.testBrowser.login(user);
 
     // # Visit a default channel page
-    const channelsPage = new pages.ChannelsPage(page);
     await channelsPage.goto();
     await channelsPage.toBeVisible();
     await channelsPage.centerView.postCreate.postMessage('hello');
@@ -24,17 +23,16 @@ test.fixme('Base channel accessibility', async ({pw, pages, axe}) => {
     expect(accessibilityScanResults.violations).toHaveLength(0);
 });
 
-test('Post actions tab support', async ({pw, pages, axe}) => {
+test('Post actions tab support', async ({pw, axe}) => {
     // # Create and sign in a new user
     const {user, adminClient} = await pw.initSetup();
     const config = await adminClient.getConfig();
     const license = await adminClient.getClientLicenseOld();
 
     // # Log in a user in new browser context
-    const {page} = await pw.testBrowser.login(user);
+    const {page, channelsPage} = await pw.testBrowser.login(user);
 
     // # Visit a default channel page
-    const channelsPage = new pages.ChannelsPage(page);
     await channelsPage.goto();
     await channelsPage.toBeVisible();
     await channelsPage.centerView.postCreate.postMessage('hello');