Dashboards: Enable scenes by default (#93818)

* Mark Scenes feature toggles as GA

* Move old arch e2e to a new folder

* Run E2E on scenes by default

* Upgrade e2e-selectors to ensure the tests in Playwright works

e2e/old-arch/utils/flows/revertAllChanges.ts

@@ -0,0 +1,12 @@
+import { e2e } from '../index';
+
+export const revertAllChanges = () => {
+  e2e.getScenarioContext().then(({ addedDashboards, addedDataSources, hasChangedUserPreferences }) => {
+    addedDashboards.forEach((dashboard) => e2e.flows.deleteDashboard({ ...dashboard, quick: true }));
+    addedDataSources.forEach((dataSource) => e2e.flows.deleteDataSource({ ...dataSource, quick: true }));
+
+    if (hasChangedUserPreferences) {
+      e2e.flows.setDefaultUserPreferences();
+    }
+  });
+};