`make install` doesn't create `lib/php/extensions/debug-non-zts-20240925/` since PHP 8.5 Alpha 4

Description

This is probably on the edge between a bug and a feature:

Since PHP 8.5 Alpha 4 the extension directory is no longer automatically created when running make install. With PHP 8.5 Alpha 2 the extension directory contains opcache.so, so this is likely related to OPcache being included in PHP itself (and also reproducible with earlier versions when OPcache is explicitly disabled at configure time).

It would probably make sense to always create the extension directory as an empty directory as part of make install, since this would also allow to set proper permissions / ownership.

see php/pie#263 /cc @asgrim

PHP Version

PHP 8.5.0alpha4 (cli) (built: Aug 14 2025 09:34:32) (NTS DEBUG)
Copyright (c) The PHP Group
Zend Engine v4.5.0-dev, Copyright (c) Zend Technologies
    with Zend OPcache v8.5.0alpha4, Copyright (c), by Zend Technologies

Operating System

No response