Investigate Backblaze's B2 storage solution for Backups

[jniles]

See the previous issue for Amazon S3 (#2284) for context.

In my experiments at HEV, the Amazon client we implemented in #2305 did not perform at all. Over a series of week, no backups were successfully made. Yet, external services (scp) are able to back up the data without any issues.

The problem could lie with either the NPM module for AWS backups, or with the network itself. Either way, I suggest we move on to a competitor, just to see how it goes.

Another appealing choice is Backblaze's B2 storage service. It has competitive pricing with a variety of integrations. It might be worth looking into.