Update qore-openldap-module to version 1.2.3 / rev 6 via SR 1276849
    
    https://build.opensuse.org/request/show/1276849
    by user AdaLovelace + anag_factory
    - Remove clean section
    - Add if case for qore >= 2.0 and BuildRequire qore-stdlib
    - Add qore-stdlib >= 2.0 as BuildRequire for new qore package
    - export CMAKE_POLICY_VERSION_MINIMUM="3.5" to ignore cmakes
      minimum version warnings