(PUP-3056) Restore Windows constants from mixins

 - Previously these constants were defined by using mixins from
   windows-pr.  As it turns out, while Puppet core does not need them,
   they are consumed by the ACL module.
Merge pull request #2967 from Iristyle/ticket/master/PUP-3056-restore-constants-API-deprecations

(PUP-3056) Restore Windows constants from mixins