[php-src] Issue #20706: version_compare() comparing 8.5 and 8.5.0 doesn't work

Issue: https://github.com/php/php-src/issues/20706
Author: staabm

### Description

The following code:

```php
<?php

var_dump(version_compare("8.5.0", "8.5.0", "<="));
var_dump(version_compare("8.5.0", "8.5", "<="));
```

Resulted in this output:
```
bool(true)
bool(false)
```

But I expected this output instead:
```
bool(true)
bool(true)
```

see https://3v4l.org/8UfAW#veol

### PHP Version

```plain
PHP 8.4.15 (cli) (built: Nov 18 2025 17:26:05) (NTS)
Copyright (c) The PHP Group
Built by Homebrew
Zend Engine v4.4.15, Copyright (c) Zend Technologies
```

### Operating System

macOS