Build and test the Python SDK without having to install Python

[pcothenet]

Asana task: https://app.asana.com/0/0/1201348859844393/f

What

• Use a multi-stage docker file (based on Python) to run the different steps of the build

Why

• Avoids needing to install every language to be able to publish SDKs

SDK Release Checklist

• Have you added an integration test for the changes?
• Have you built the library locally and made queries against it successfully?
• Did you update the changelog?
• Did you bump the package version?
• For breaking changes, did you plan for the release of the new SDK versions and deploy the API to production?

[alianam]

Thank you for getting this set up for me! I very much appreciate it