Remove security test for CVE-2023-2454
The test uses syntax for CREATE TABLE which is not yet allowed in
PostgreSQL 10 and it would be hard to backport such syntax. There is
still one regression test that verifies whether CVE-2023-2454 is fixed.
Also updates postgresql-setup to 8.7, which fixes a problem during
modular builds where modules dependent on this package fail to build due
to a no longer valid rpm statement.
See: https://github.com/devexp-db/postgresql-setup/pull/35.
Resolves: #2207931