[Docs] CI FAQ User Section

- Diagramms
- where can I find the results of running one of these tasks locally?
- why might I want to use archery docker run vs. docker run?
dev
- ...

**Reporter**: [Jacob Wujciak](https://issues.apache.org/jira/browse/ARROW-16366) / @assignUser

_{**Note**: *This issue was originally created as [ARROW-16366](https://issues.apache.org/jira/browse/ARROW-16366). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}

Start with the migration documentation linked in the issue, then review the CI FAQ context and the mentioned archery docker run and docker run workflows. Done means documenting the requested diagrams, where local task results appear, and why a user might choose archery docker run over docker run.

Written by the indexing model from the issue text.