twai: migrate example test to pytest

examples/peripherals/gpio/generic_gpio/pytest_generic_gpio_example.py

@@ -0,0 +1,16 @@
+# SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+
+from typing import Callable
+
+import pytest
+from pytest_embedded import Dut
+
+
+@pytest.mark.supported_targets
+@pytest.mark.generic
+def test_generic_gpio_example(
+    dut: Dut, log_minimum_free_heap_size: Callable[..., None]
+) -> None:
+    log_minimum_free_heap_size()
+    dut.expect(r'cnt: \d+')