example: migrate to use pulse_cnt driver

examples/peripherals/pcnt/rotary_encoder/pytest_rotary_encoder.py

@@ -0,0 +1,22 @@
+# SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+
+import pytest
+from pytest_embedded.dut import Dut
+
+
+@pytest.mark.esp32
+@pytest.mark.esp32s2
+@pytest.mark.esp32s3
+@pytest.mark.generic
+def test_gptimer_example(dut: Dut) -> None:
+    dut.expect_exact('install pcnt unit')
+    dut.expect_exact('set glitch filter')
+    dut.expect_exact('install pcnt channels')
+    dut.expect_exact('set edge and level actions for pcnt channels')
+    dut.expect_exact('add watch points and register callbacks')
+    dut.expect_exact('clear pcnt unit')
+    dut.expect_exact('start pcnt unit')
+    res = dut.expect(r'Pulse count: (\d+)')
+    count_val = res.group(1).decode('utf8')
+    assert -100 <= int(count_val) <= 100