ctype: test lc_ctype_inheritance.phpt fails on some macOS systems

[nielsdos]

Description

This was reported on nixpkgs, see NixOS/nixpkgs#398486 (comment) for more info.
It appears the test may need some tweaking given that their environment outside of PHP also reproduces the result that they get in PHP.

PHP Version

8.3.x

Operating System

macOS 15.4

[jorgsowa]

I can reproduce it locally and it's weird that for the same letter uppercase (Ä) and lowercase (ä) the result is the same.

https://3v4l.org/plcZG

[nielsdos]

Thing is, this just calls macOS's ctype locale functions, so something changed in there which is seemingly wrong.