Use context manager for __file_loader.load_to_temp_file

[svij-sc]

with self.__file_loader.load_to_temp_file(file_uri_src=uri, delete=False) as tfh:
    with open(thf, 'w') as f:
      ...

without the tfh.close() call?

Originally posted by @kmontemayor2-sc in #279 (comment)