Don't leave roles behind after core regression tests.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: d0d968328794a25c844dc57585d0289a08159bb5
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2023-01-11T17:22:47Z
Releases: 16.0
Don't leave roles behind after core regression tests.

Commits cf5eb37c5 and e5b8a4c09 each created a new role that they
forgot to remove again.  This breaks the use-case of running "make
installcheck" more than once, and it's also against project policy
because it'd be quite unfriendly behavior if one were running
"make installcheck" against a non-throwaway installation.

Files