Add support for downloading result from s3

[jankaifer]

context is in #65

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
2 out of 3 committers have signed the CLA.

✅ jankaifer
✅ jan2893
❌ jan.kaifer

---

jan.kaifer seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[jankaifer]

An interesting detail is that I fetch that s3 file only if there are multiple pages. If all results are present on the first page, then we don't need to download the S3 file.

I fetch the first page every time because we need metadata information anyway (like types of columns etc.). And doing one extra request is not that problematic for large queries anyway.