[GIT-PULLS] [php-src] PR #22643: Fix leak on double DatePeriod::__construct() call

Pull Request: https://github.com/php/php-src/pull/22643
Author: iluuu1994

See https://github.com/php/php-src/actions/runs/28911263674/job/85769105449.

Normally we might want to discuss whether such code is even sensible, but it seems carbon is relying on it, as evidenced by the CI failure above. A minimal carbon example that reproduces the error:

```php
<?php

use Carbon\Carbon;

require __DIR__ . '/vendor/autoload.php';

$day = Carbon::now();
$period = Carbon::now()->toPeriod($day);
```