chore: Add presigned URL to debug logs

[pavelzw]

Description

In some cases you might want to debug why your pixi call to S3 didn't work. For this, I added a debug log with the presigned URL. Since the URL expires in a fixed amount of time (iirc 5min by default) anyway, I wouldn't consider this leaking secrets, wdyt?

[wolfv]

Hmm not the biggest fan. Could we just make sure that we print meaningful error when the download does not succeed?

[baszalmstra]

@pavelzw are you still planning on incorporating @wolfv s comment?

[pavelzw]

i for now don't have the need for this anymore. eventually, it might be nice to also print this stuff but i don't plan on working on this in the near future