Check for `concurrently` when running `alter table t detach partition p`

[sbdchd]

Detaching a partition requires requires an access exclusive lock that can be avoided by passing in concurrently.

https://www.postgresql.org/docs/current/ddl-partitioning.html

https://www.postgresql.org/docs/current/sql-altertable.html#SQL-ALTERTABLE-DETACH-PARTITION