[Perl/perl5] 9af310: Add some tests of non-ASCII UTF-8 handling of class.c

[Paul Evans via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 9af3108046af394b01d80a67e3ecca2e41904be4
      
https://github.com/Perl/perl5/commit/9af3108046af394b01d80a67e3ecca2e41904be4
  Author: Paul "LeoNerd" Evans <leon...@leonerd.org.uk>
  Date:   2024-02-12 (Mon, 12 Feb 2024)

  Changed paths:
    M MANIFEST
    A t/class/utf8.t

  Log Message:
  -----------
  Add some tests of non-ASCII UTF-8 handling of class.c