There's a merged pull request on the void-packages repository

GCP-Guest-Environment: move to python3
https://github.com/void-linux/void-packages/pull/39563

Description:
supports both python 2 and 3, but was using 2 still

#### Testing the changes
- I tested the changes in this PR: **NO**
    - I *don't* use anything google-cloud-related so I can't test this