[Perl/perl5] 3fa85d: locale.c: Use macros to avoid some #ifdef's

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 3fa85d5507f4b5641847a5227e14c8ba16a5c062
      
https://github.com/Perl/perl5/commit/3fa85d5507f4b5641847a5227e14c8ba16a5c062
  Author: Karl Williamson <k...@cpan.org>
  Date:   2024-01-09 (Tue, 09 Jan 2024)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use macros to avoid some #ifdef's

This #defines these macros once depending on the Configuration to be
either no-ops, or the appropriate expansion.  Then in the code just the
macros instead of #ifdef's.