PHP binary path hardcoded

Would it be possible to be able to override path to PHP binary inside this handler, please? Maybe using some ENV variable?
I am using wrapper for PHP 8.5 under WSL1, so PHP_BINARY constant does not return wrapper, but original binary. Therefore I get this error when running composer under PHP 8.5 with Xdebug enabled:

```
PHP Warning: proc_open(): posix_spawn() failed: Exec format error in phar:///usr/local/bin/composer/vendor/composer/xdebug-handler/src/XdebugHandler.php on line 300
PHP Stack trace:
PHP 1. {main}() /usr/local/bin/composer:0
PHP 2. require() /usr/local/bin/composer:29
PHP 3. Composer\XdebugHandler\XdebugHandler->check() phar:///usr/local/bin/composer/bin/composer:43
PHP 4. Composer\XdebugHandler\XdebugHandler->restart($command = [0 => '/usr/bin/php8.5-bin', 1 => '-n', 2 => '-c', 3 => '/tmp/fh3d7t9hgapgdGR3Iik', 4 => '/usr/local/bin/composer']) phar:///usr/local/bin/composer/vendor/composer/xdebug-handler/src/XdebugHandler.php:149
PHP 5. Composer\XdebugHandler\XdebugHandler->doRestart($command = [0 => '/usr/bin/php8.5-bin', 1 => '-n', 2 => '-c', 3 => '/tmp/fh3d7t9hgapgdGR3Iik', 4 => '/usr/local/bin/composer']) phar:///usr/local/bin/composer/vendor/composer/xdebug-handler/src/XdebugHandler.php:274
PHP 6. proc_open($command = [0 => '/usr/bin/php8.5-bin', 1 => '-n', 2 => '-c', 3 => '/tmp/fh3d7t9hgapgdGR3Iik', 4 => '/usr/local/bin/composer'], $descriptor_spec = [], $pipes = NULL) phar:///usr/local/bin/composer/vendor/composer/xdebug-handler/src/XdebugHandler.php:300
```

It would be nice if path to PHP binary could be specified manually here.

Here is relevant part:
https://github.com/composer/xdebug-handler/blob/main/src/XdebugHandler.php#L438

Instead of:
```
$php = [PHP_BINARY];
```

Maybe something like:

```
$php = [getenv('PHP_BINARY') ?: PHP_BINARY];
```

Or some other solution...?

Thanks!

Bắt đầu trong src/XdebugHandler.php, quanh dòng 438, nơi lệnh khởi động lại chọn PHP_BINARY, và theo dõi cách giá trị đó đi đến quá trình khởi động lại. Xác định và ghi lại hành vi override, bao gồm fallback khi không cung cấp override, sau đó xác minh rằng binary đã cấu hình được sử dụng cho lệnh được khởi động lại.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.