[php-src] Issue #21822: PHP Warning: Module "FFI" is already loaded in Unknown on line 0

Issue: https://github.com/php/php-src/issues/21822
Author: remco-pc

### Description

i've changed the ffi settings to:
```ini
extension=ffi
ffi.enable=true
```

and this is causing this error:
PHP Warning:  Module "FFI" is already loaded in Unknown on line 0

and i've changed these values both in cli and web




### PHP Version

```plain
PHP Warning:  Module "FFI" is already loaded in Unknown on line 0
PHP 8.4.20 (cli) (built: Apr 11 2026 07:44:29) (NTS)
Copyright (c) The PHP Group
Built by Debian
Zend Engine v4.4.20, Copyright (c) Zend Technologies
    with Zend OPcache v8.4.20, Copyright (c), by Zend Technologies
```

### Operating System

Debian 12.11