Expose array_map or similar in Expression Language

### Description

Expose `array_map` or something equivalent (such as `mapMethod`, see below) to allow working with arrays.

```php
function mapMethod(array $items, string $method): array {
    return array_map(fn($item) => $item->$method(), $items);
}
```

### Example

```
'needle' in mapMethod(myArray, `getMyField`)
```