DDC-3704: [GH-1390] Document the ChainCache class

[doctrinebot]

Jira issue originally created by user @doctrinebot:

This issue is created automatically through a Github pull request on behalf of deviantintegral:

Url: #1390

Message:

I was thisclose to writing a ChainCache class myself, and only avoided it by actually looking in the source. There's no mention of ChainCache on Google, probably because there's no docs for it. ChainCache is a bit different from other drivers in that it's something implementers will want to use in their own code in place of an ArrayCache or static array. However, I also added a link to the cache drivers given there's quite a few that aren't mentioned in the docs.

[doctrinebot]

Issue was closed with resolution "Fixed"