Support uploading the exported-from-Postgres sqlite DB to cloud storage

[stevejalim]

Description

Currently, the clock pod updates the DB and then uploads it to the cloud bucket for the other pods to pull down.

When we switch to postgres as Bedrock's DB backend, we won't have a sqlite DB to copy over to the bucket, but we do want to retain that overall behaviour, because then Bedrock can be used locally (or in things like www-sitemap-generator) without needing postgres.

In #14993 we improved our tooling to generate a sqlite DB from postgres. Now we need to run that exporter on a schedule and copy the resulting DB up to the regular cloud bucket that the clock pod used to do.

Ideally we should re-use any existing scripts so that it's basically just the source of bedrock.db that changes. When postgres is in use, the bedrock.db file is redundant, but our upload script knows to look for it and how to generate the JSON metadata file that goes with it, so it makes sense to try to repurpose as much of our tried-and-tested scripting as we can.

Note: this work will actually take place over in our (private) infra repo

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Success Criteria

• A fresh DB is generated, with appropriately scrubbed data
• That DB is uploaded to the appropriate bucket
• That DB can be pulled down and loaded in for use in any Bedrock container, as now

[stevejalim]

This appears to be working