Update postgresql15 to version 15.12 / rev 22 via SR 1247458
    
    https://build.opensuse.org/request/show/1247458
    by user rmax + anag+factory
    - Upgrade to 15.12:
      * Improve behavior of libpq's quoting functions:
        The changes made for CVE-2025-1094 had one serious oversight:
        PQescapeLiteral() and PQescapeIdentifier() failed to honor
        their string length parameter, instead always reading to the
        input string's trailing null. This resulted in including
        unwanted text in the output, if the caller intended to
        truncate the string via the length parameter. With very bad
        luck it could cause a crash due to reading off the end of
        memory.
        In addition, modify all these quoting functions so that when
        invalid encoding is detected, an invalid sequence is
        substituted for just the first byte of the presumed
        character, not all of it. This reduces the risk of problems
        if a calling application perform