usb: Refactor USB Host tests

* USB tests migrated to pytest
* Error messages improved
* Configurable for different mock devices

components/usb/test_apps/hcd/pytest_usb_hcd.py

@@ -0,0 +1,14 @@
+# SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+
+import pytest
+from pytest_embedded import Dut
+
+
+@pytest.mark.esp32s2
+@pytest.mark.esp32s3
+@pytest.mark.usb_host_flash_disk
+def test_usb_hcd(dut: Dut) -> None:
+    dut.expect_exact('Press ENTER to see the list of tests')
+    dut.write('[full_speed]')
+    dut.expect_unity_test_output()