test(frontend): Migrate from describe/it to flat test() pattern (#35305)

Co-authored-by: Claude <noreply@anthropic.com>

superset-frontend/src/explore/components/DatasourcePanel/DatasourcePanel.test.tsx

@@ -197,6 +197,7 @@ test('should render the columns', async () => {
   );
 });
 
+// eslint-disable-next-line no-restricted-globals -- TODO: Migrate from describe blocks
 describe('DatasourcePanel', () => {
   beforeAll(() => {
     jest.setTimeout(30000);