refactor(usb/host_msc_example): Increase transfer speeds

- Upgrade to MSC driver 1.1.1 for zero copy transfers
- Use setvbuf() to increase size of VFS file buffer
- Add example test

examples/peripherals/usb/host/msc/pytest_usb_host_msc.py

@@ -0,0 +1,27 @@
+
+# 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_host_msc_example(dut: Dut) -> None:
+    # Check result of file_operations()
+    dut.expect_exact("example: Read from file '/usb/esp/test.txt': 'Hello World!'")
+
+    # Check result of speed_test()
+    write_throughput = float(dut.expect(r'example: Write speed ([0-9]*[.]?[0-9]+) MiB')[1].decode())
+    read_throughput = float(dut.expect(r'example: Read speed ([0-9]*[.]?[0-9]+) MiB')[1].decode())
+
+    # These values should be updated for HS targets
+    if write_throughput > 0.9:
+        print('Write throughput put OK')
+    else:
+        print('write throughput too slow!')
+    if read_throughput > 1.0:
+        print('Read throughput put OK')
+    else:
+        print('Read throughput too slow!')