[php-src] Issue #22285: PHP 8.5 Soap server requires the raw input to be passed to $server->handle

Issue: https://github.com/php/php-src/issues/22285
Author: jahyvari

### Description

The following code:

```php
<?php
$server->handle();
```

Is working with PHP 8.4.

But with PHP 8.5 I had to change it to:

```php
<?php
$server->handle(file_get_contents("php://input"));
```

Without it, the server is not handling the incoming requests.

Could it be some kind of rewind issue, since the code is reading the php input before the handle function is called, to do custom Schema validation.

### PHP Version

```plain
PHP 8.5.7 (cli) (built: Jun  2 2026 20:59:56) (NTS gcc x86_64)
Copyright (c) The PHP Group
Built by Remi's RPM repository <https://rpms.remirepo.net/> #StandWithUkraine
Zend Engine v4.5.7, Copyright (c) Zend Technologies
    with Zend OPcache v8.5.7, Copyright (c), by Zend Technologies
```

### Operating System

_No response_