Gcs database

[bkochendorfer]

One-line summary

Allow uploading and downloading from GCP CS (GCS) instead of AWS S3.

Significant changes and points to review

I felt like just throwing an error during the upload if there was a failure is fine but let me know if you want me to try to figure out what to catch.

Issue / Bugzilla link

https://github.com/mozilla/bedrock/issues/12637

Testing

I deployed the change manually in our dev gcp environment and connected to the clock pod to manually run an upload and a download.