Revert "Revert "Dsiable CPU/GPU measurement on BackdropFilter test (#41736)" (#41780)" (#41795)

This reverts commit 19c08e89.

The attempted revert doesn't fix the problem, so we'll reland.

dev/devicelab/bin/tasks/backdrop_filter_perf_ios__timeline_summary.dart

@@ -10,5 +10,5 @@ import 'package:flutter_devicelab/framework/framework.dart';
 
 Future<void> main() async {
   deviceOperatingSystem = DeviceOperatingSystem.ios;
-  await task(createBackdropFilterPerfTest(needsMeasureCpuGpu: true));
+  await task(createBackdropFilterPerfTest());
 }