Describe the bug

There is logic in the download data sets methods that if a download fails, it deletes the file at the same destination.

I'm not really sure why this is the intended logic, because if a file already exists in the same destination (for example you are redownloading a file to get updates perhaps) and you get an error (let's say you've lost connection with the server), then the existing file will be deleted.

E.g.

Expected and actual results

If the API returns enough info to make it possible, then I think the intention is that it should delete partially downloaded files. That's what I'd expect anyway.

Describe your environment

On a branch of Zowe Explorer main (3.3.0 SNAPSHOT) which is using zos-files 8.24.1

Additional context

This undesired behaviour actually happened to me mid testing so it's not just a pre-emptive thing from reading the code.