SUSE-SU-2026:2000-1 Security update for postgresql15

This update for postgresql15 fixes the following issues Update to version 15.18. Security issues: - CVE-2026-6472: ensure the user has CREATE privilege on the schema specified bsc1265172. - CVE-2026-6473: integer overflows in memory-allocation calculations bsc1265173. - CVE-2026-6474: Guard again...