add cleanup code, test=develop (#43305)

python/paddle/fluid/tests/unittests/ipu/test_weight_decay_ipu.py

@@ -35,6 +35,9 @@ class TestBase(IPUOpTest):
         self.temp_dir = tempfile.TemporaryDirectory()
         self.model_path = os.path.join(self.temp_dir.name, "weight_decay")
 
+    def tearDown(self):
+        self.temp_dir.cleanup()
+
     def set_atol(self):
         self.atol = 1e-6
 

python/paddle/fluid/tests/unittests/test_load_op_xpu.py

@@ -51,6 +51,9 @@ class TestLoadOpXpu(unittest.TestCase):
                                    dirname=self.model_path,
                                    main_program=main_prog)
 
+    def tearDown(self):
+        self.temp_dir.cleanup()
+
     def test_load_xpu(self):
         main_prog = fluid.Program()
         start_prog = fluid.Program()