Allow "Expr\Func" as condition in join in PHPDoc

[willemverspyck]

I use "Expr\Func" as 4th parameter of innerJoin, but according to the PHPDoc it's not allowed:

Solves #8151

Current parameter is https://github.com/doctrine/orm/blob/2.13.x/lib/Doctrine/ORM/QueryBuilder.php#L1025

For example when I use the "in" expression in the join condition:

$qb = $this->entityManager->createQueryBuilder();
$qb
    ->select('u', 'a')
    ->from(CmsUser::class, 'u')
    ->innerJoin('u.articles', 'a', Join::WITH, $qb->expr()->in(
        'u.id',
        [1, 2, 3]
    ));

it generates the query .... WITH u.id IN(1, 2, 3), but currently it's not allowed according to the PHPDoc.

[derrabus]

Thank you!