The BRIN minmax opclasses included amproc entries with mismatching left
and right types, but those happen to be unnecessary.  The opclasses only
need cross-type operators, not cross-type support procedures. Discovered
when trying to define equivalent BRIN operator families in an extension.

Catversion bump, because of pg_amproc changes.

Author: Tomas Vondra
Reviewed-by: Alvaro Herrera
Discussion: https://postgr.es/m/78c357ab-3395-8433-e7b3-b2cfcc9fdc23%40enterprisedb.com