There are three major things occurring in this pull request:
1. Renaming `Article#update_cached_user` to `Article#set_cached_entities`.
2. Reducing an organization's direct knowledge of which of the org's
attributes an article caches.
3. Removing duplicate calls to update the article associated with the
organization.
For renaming to `Article#set_cached_entities`, the prior method implied
we were updating the persistence layer. However, we were not making any
save nor update calls. This rename should clarify intention.
For reducing knowledge, the comments for
`Article::ATTRIBUTES_CACHED_FOR_RELATED_ENTITY` should explain the details.
And last, removing the duplicate calls; we had three methods that were
attempting to build and update the `Article#cached_organization`'s
value.
Closesforem/forem#17041
d462abb5b5