ref(js): Convert alertStore.spec to tsx (#51822)

static/app/stores/alertStore.spec.jsx → static/app/stores/alertStore.spec.tsx

@@ -58,7 +58,13 @@ describe('AlertStore', function () {
       expect(AlertStore.alerts[1].key).toEqual(3);
     });
     it('should persist removal of persistent alerts', function () {
-      const alert = {key: 1, id: 'test', message: 'foo', type: 'error'};
+      const alert = {
+        key: 1,
+        id: 'test',
+        message: 'this is a test',
+        type: 'error',
+      } as const;
+
       AlertStore.closeAlert(alert);
       AlertStore.addAlert(alert);
       expect(AlertStore.alerts).toHaveLength(0);