[EarlyReturn] Handle crash on assign in if else before on RemoveAlwaysElseRector

[samsonasik]

Closes #2821 Fixes rectorphp/rector#7412

Given the following code:

function assignInIfElseBefore($can_order_products, $offset, $limit)
{
    if (!empty($can_order_products)) {
        if (!empty($limit)) {
            if (!empty($offset)) {
                $can_order_products = array_slice($can_order_products, $offset, $limit);
            } else {
                $can_order_products = array_slice($can_order_products, 0, $limit);
            }

            if (!empty($can_order_products)) {
                return $can_order_products;
            } else {
                return false;
            }
        } else {
            return $can_order_products;
        }
    }

    return false;
}

It currently produce error:

There was 1 failure:

1) Rector\Tests\EarlyReturn\Rector\If_\RemoveAlwaysElseRector\RemoveAlwaysElseRectorTest::test with data set #4 (Symplify\SmartFileSystem\SmartFileInfo Object (...))
assert($itemStartPos >= 0 && $itemEndPos >= 0 && $itemStartPos >= $pos) in /Users/samsonasik/www/rector-src/vendor/nikic/php-parser/lib/PhpParser/PrettyPrinterAbstract.php:759

[samsonasik]

All checks have passed 🎉 @TomasVotruba it is ready for review.

[TomasVotruba]

Thank you 👍