ObjectCode fails to accept passing a filename

[leofang]

From @benbarsdell:

passing a filename (str type) to cuda.core.experimental._module.ObjectCode is broken (with both old and new backends)

With the new backend it gives TypeError: cuLibraryLoadFromFile() takes exactly 7 positional arguments (1 given), and with the old it complains about passing str instead of bytes to the cuda driver api.