Ability to add container class for paginate_links()

[prionkor]

When type is set to list. The class of the <ul> is currently hardcoded. Could it be send via the argument?

A new key container_class can be introduced

$args = array(
    'type' => 'list',
    'container_class' => 'my-pagination-class'
);

$pagination = paginate_links($args);

[SergeyBiryukov]

Duplicate of #28433.