Relation details based on adapter's include policy

[jtcohen6]

• Similar to In dbt run, log relations for the status line instead of explicit node info dbt-core#2450
• Defer to adapter's policy when deciding which components of a relation's namespace to include in the Details section

https://github.com/fishtown-analytics/dbt-docs/blob/8be33c1c1922fa3dcbb4c659cf3c3d5cd1c968ed/src/app/components/table_details/table_details.js#L79-L85