Update postgresql15 to version 15.13 / rev 23 via SR 1278025
    
    https://build.opensuse.org/request/show/1278025
    by user rmax + anag_factory
    - Upgrade to 15.13:
      * bsc#1242931, CVE-2025-4207: postgresql: PostgreSQL GB18030
        encoding validation can read one byte past end of allocation
        for text that fails validation.
      * https://www.postgresql.org/docs/release/15.13/
      * https://www.postgresql.org/about/news/p-3072/
    - Add postresql-pg_config_paths.patch to fix a race condition
      while generating pg_config_paths.h.