MM-63820 chore(e2e): update dependencies and docs (#30807)

* chore(e2e): update dependencies and docs

* update the use of postMessage, expose 8065 on test server and fix flakiness on profile popover

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

@@ -13,7 +13,7 @@ test.fixme('Base channel accessibility', async ({pw, axe}) => {
     // # Visit a default channel page
     await channelsPage.goto();
     await channelsPage.toBeVisible();
-    await channelsPage.centerView.postCreate.postMessage('hello');
+    await channelsPage.postMessage('hello');
 
     // # Analyze the page
     // Disable 'color-contrast' to be addressed by MM-53814
@@ -35,7 +35,7 @@ test('Post actions tab support', async ({pw, axe}) => {
     // # Visit a default channel page
     await channelsPage.goto();
     await channelsPage.toBeVisible();
-    await channelsPage.centerView.postCreate.postMessage('hello');
+    await channelsPage.postMessage('hello');
 
     const post = await channelsPage.getLastPost();
     await post.hover();