test(mge/test): reorganize utils test files

GitOrigin-RevId: 08d27a8b1d18fa4d25b5c6f34486d1e8d4f0fae3

imperative/python/test/unit/test_tracing.py → imperative/python/test/unit/jit/test_tracing.py

@@ -28,6 +28,7 @@ from megengine.functional import exp, log
 from megengine.jit import exclude_from_trace, trace
 from megengine.module import Module
 from megengine.random import normal, uniform
+from megengine.utils.naming import auto_naming
 
 
 @pytest.mark.parametrize("trace_mode", [False, True])
@@ -139,6 +140,8 @@ def test_dump():
     def f(a, b):
         return a + b
 
+    # prevent from remaining scope from exception test
+    auto_naming.clear()
     a = tensor([2])
     b = tensor([4])
     y = f(a, b).numpy()