lwip: Migrate unit tests to test_apps

components/lwip/test_apps/pytest_lwip.py

@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
+
+import pytest
+from pytest_embedded import Dut
+
+
+@pytest.mark.esp32
+@pytest.mark.generic
+def test_lwip(dut: Dut) -> None:
+    dut.expect_unity_test_output()