MM-63669 E2E/Playwright: Move "e2e-tests/playwright/test" to "e2e-tests/playwright" folder (#30647)

* move "e2e-tests/playwright/test" to  "e2e-tests/playwright/test" and expose "ensurePluginsLoaded"

* add test setup, and expose ensurePluginsLoaded and ensureServerDeployment to pw

e2e-tests/playwright/specs/visual/common/signup_email.spec.ts

@@ -0,0 +1,40 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import {test} from '@mattermost/playwright-lib';
+
+test('/signup_email', async ({pw, page, browserName, viewport}, testInfo) => {
+    // Set up the page not to redirect to the landing page
+    await pw.hasSeenLandingPage();
+
+    // Go to login page
+    const {adminClient} = await pw.getAdminClient();
+    await pw.loginPage.goto();
+    await pw.loginPage.toBeVisible();
+
+    // Create an account
+    await pw.loginPage.createAccountLink.click();
+
+    // Should have redirected to signup page
+    await pw.signupPage.toBeVisible();
+
+    // Click to other element to remove focus from email input
+    await pw.signupPage.title.click();
+
+    // Match snapshot of signup_email page
+    const testArgs = {page, browserName, viewport};
+    const license = await adminClient.getClientLicenseOld();
+    const editionSuffix = license.IsLicensed === 'true' ? '' : 'free edition';
+    await pw.matchSnapshot({...testInfo, title: `${testInfo.title} ${editionSuffix}`}, testArgs);
+
+    // Click sign in button without entering user credential
+    const invalidUser = {email: 'invalid', username: 'a', password: 'b'};
+    await pw.signupPage.create(invalidUser, false);
+    await pw.signupPage.emailError.waitFor();
+    await pw.signupPage.usernameError.waitFor();
+    await pw.signupPage.passwordError.waitFor();
+    await pw.waitForAnimationEnd(pw.signupPage.bodyCard);
+
+    // Match snapshot of signup_email page
+    await pw.matchSnapshot({...testInfo, title: `${testInfo.title} error ${editionSuffix}`}, testArgs);
+});