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/confirmModal.ts

@@ -0,0 +1,6 @@
+import { e2e } from '..';
+
+export function confirmDelete() {
+  cy.get(`input[placeholder='Type "Delete" to confirm']`).type('Delete');
+  e2e.pages.ConfirmModal.delete().click();
+}