Clean up test_uptane_vector directories.
Clean up test_uptane_vector directories.

Use TemporaryDirectory class. Works great!

advancedtelematic/sota_client_cpp,advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/sota_client_cpp,advancedtelematic/aktualizr,advancedtelematic/aktualizr