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/userPreferences.ts

@@ -0,0 +1,25 @@
+import { Preferences as UserPreferencesDTO } from '@grafana/schema/src/raw/preferences/x/preferences_types.gen';
+
+import { e2e } from '..';
+import { fromBaseUrl } from '../support/url';
+
+const defaultUserPreferences = {
+  timezone: '', // "Default" option
+} as const; // TODO: when we update typescript >4.9 change to `as const satisfies UserPreferencesDTO`
+
+// Only accept preferences we have defaults for as arguments. To allow a new preference to be set, add a default for it
+type UserPreferences = Pick<UserPreferencesDTO, keyof typeof defaultUserPreferences>;
+
+export function setUserPreferences(prefs: UserPreferences) {
+  e2e.setScenarioContext({ hasChangedUserPreferences: prefs !== defaultUserPreferences });
+
+  return cy.request({
+    method: 'PUT',
+    url: fromBaseUrl('/api/user/preferences'),
+    body: prefs,
+  });
+}
+
+export function setDefaultUserPreferences() {
+  return setUserPreferences(defaultUserPreferences);
+}