[php-src] Issue #21283: iterating over the same array twice, first by reference and then by value seems to give different results

Issue: https://github.com/php/php-src/issues/21283
Author: aliber4079

### Description

The following code:

```php
<?php
$criteria=[
        "a",
        "b",
];
var_dump($criteria);
foreach ($criteria as &$criterion) {
}
foreach ($criteria as /*&*/$criterion){
}                              
var_dump($criteria);
```

Resulted in this output:
```
array(2) {
  [0]=>
  string(1) "a"
  [1]=>
  string(1) "b"
}
array(2) {
  [0]=>
  string(1) "a"
  [1]=>
  &string(1) "a"
}
```

But I expected this output instead:
```
array(2) {
  [0]=>
  string(1) "a"
  [1]=>
  string(1) "b"
}
array(2) {
  [0]=>
  string(1) "a"
  [1]=>
  &string(1) "b"
}
```


### PHP Version

```plain
PHP 8.5.3 (cli) (built: Feb 10 2026 18:44:09) (ZTS Visual C++ 2022 x64)
Copyright (c) The PHP Group
Built by The PHP Group
Zend Engine v4.5.3, Copyright (c) Zend Technologies
    with Zend OPcache v8.5.3, Copyright (c), by Zend Technologies
```

### Operating System

windows x64