odrs: Use memory copy in g_memory_input_stream_new_from_data() with libsoup3

The passed-in data is temporary, thus make a copy of it when passing
it into g_memory_input_stream_new_from_data(), thus it survives the caller
function end (because this is ran asynchronously).

Closes https://gitlab.gnome.org/GNOME/gnome-software/-/issues/1954