[php-src] Issue #21894: PHP command line help text doesn't match behaviour (double dash usage)

Issue: https://github.com/php/php-src/issues/21894
Author: bug-fix0r

### Description

When I run **php --help** it says:

`Usage: php [options] [-f] <file> [--] [args...]`

The following code (when run using **php test.php -- test**):

```php
<?php
var_dump($argv);
```

Resulted in this output:
```
array(3) {
  [0]=>
  string(8) "test.php"
  [1]=>
  string(2) "--"
  [2]=>
  string(4) "test"
}
```

But I expected this output instead:
```
array(3) {
  [0]=>
  string(8) "test.php"
  [1]=>
  string(4) "test"
}
```

So in my opinion either the help text or the code needs a fix.

### PHP Version

```plain
PHP 8.5.4 (cli)
```

### Operating System

Kubuntu 26.04 LTS