Fix invalid role names introduced in 096dd80f3c

Alexander Korotkov <akorotkov@postgresql.org>

Commit: beecbe8e5001249f0ad51f828d66238dd5160072
Author: Alexander Korotkov <akorotkov@postgresql.org>
Date: 2022-12-09T10:53:32Z
Releases: 16.0
Fix invalid role names introduced in 096dd80f3c

096dd80f3c added new regression tests dealing with roles.  By oversight, role
names didn't start with regress_ prefix.  This commit fixes that.

Files