test: update Aura tabs screenshots, disable tab transitions (#11385)

Author: web-padawan

packages/tabs/test/visual/aura/screenshots/dark/tabs/baseline/ltr-horizontal-scroll.png

@@ -1,5 +1,6 @@
 import { fixtureSync, nextFrame } from '@vaadin/testing-helpers';
 import { visualDiff } from '@web/test-runner-visual-regression';
+import '../not-animated-styles.js';
 import '@vaadin/aura/aura.css';
 import '../../../vaadin-tabs.js';