Benchmarks: Code Revision - Rename kernel_launch_overhead metrics (#171)

**Description**
Rename `kernel_launch_overhead_event` to `event_overhead`, `kernel_launch_overhead_wall` to `wall_overhead`.

superbench/benchmarks/micro_benchmarks/kernel_launch_overhead.py

@@ -100,8 +100,8 @@ def _process_raw_result(self, cmd_idx, raw_output):
             )
             return False
 
-        self._result.add_result('kernel_launch_overhead_event', result[0])
-        self._result.add_result('kernel_launch_overhead_wall', result[1])
+        self._result.add_result('event_overhead', result[0])
+        self._result.add_result('wall_overhead', result[1])
 
         return True
 

tests/benchmarks/micro_benchmarks/test_kernel_launch_overhead.py

@@ -36,7 +36,7 @@ def test_kernel_launch_overhead():
     assert ('raw_output_0' in benchmark.raw_data)
     assert (len(benchmark.raw_data['raw_output_0']) == 1)
     assert (isinstance(benchmark.raw_data['raw_output_0'][0], str))
-    for metric in ['kernel_launch_overhead_event', 'kernel_launch_overhead_wall']:
+    for metric in ['event_overhead', 'wall_overhead']:
         assert (metric in benchmark.result)
         assert (len(benchmark.result[metric]) == 1)
         assert (isinstance(benchmark.result[metric][0], numbers.Number))