Stop using Scheduler.log to test double invocations

We don't do this to test double render invocations either since we ignore Scheduler.log for the second render.
The plan is to do the same for double invoking effects to reduce test noise.

packages/internal-test-utils/__tests__/ReactInternalTestUtils-test.js

@@ -161,7 +161,11 @@ describe('ReactInternalTestUtils', () => {
 
     const root = ReactNoop.createRoot();
     await act(() => {
-      root.render(<App />);
+      root.render(
+        <React.StrictMode>
+          <App />
+        </React.StrictMode>
+      );
     });
     assertLog(['A', 'B', 'C']);
   });