[BACK-1572] Migrate documents requiring new Object ID
[BACK-1572] Migrate documents requiring new Object ID

The migration was attempting to change the Mongo Object ID (`_id`) as
part of a regular update. However, Object ID is immutable, meaning that
to resolve this issue, we needed to add a copy of the existing object with
the new Object ID, and archive the old one.

* Fixes [BACK-1572]

tidepool-org/platform,tidepool-org/platform