* Alerting: Fix and stabilize saved searches E2E tests
Stabilizes the saved searches E2E tests by ensuring correct feature
toggles are enabled and improving the data cleanup logic.
Previously, `clearSavedSearches` relied on clearing localStorage, which
was insufficient as saved searches are persisted server-side via the
UserStorage API. The cleanup now correctly invokes the UserStorage API.
Changes:
- Add `alerting` project to Playwright configuration with authentication
- Enable `alertingListViewV2`, `alertingFilterV2`, and `alertingSavedSearches` toggles in tests
- Update `clearSavedSearches` helper to use UserStorage API for reliable cleanup
- Improve test selectors to use more robust `getByRole` and `getByText` queries
- Update `SavedSearchItem` to merge `aria-label` into `tooltip` for consistency
* Fix saved searchers unit tests
0faab257b1