tests/qtest/cxl-test: Clean up temporary directories after testing

It's good style to clean up temporary directories when they
are not needed anymore.

Message-Id: <20230622114132.372898-1-thuth@redhat.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
1 file changed