HHH-19192 Bulk delete of owner with soft-delete element-collection physically deletes the collection rows

[robwgreenjr]

Previously when soft delete was set on a collection below SQL would be generated:

[Hibernate] 
    delete 
    from
        employee_accolades to_delete_ 
    where
        to_delete_.employee_fk in (select
            e1_0.id 
        from
            employees e1_0 
        where
            e1_0.id=1 
            and e1_0.deleted_at is null)

[Hibernate] 
    update
        employees e1_0 
    set
        deleted_at=localtimestamp 
    where
        e1_0.id=1 
        and e1_0.deleted_at is null

these changes make sure we don't physically delete with the new SQL looking like:

Hibernate: 
    update
        employee_accolades to_delete_ 
    set
        deleted_on=localtimestamp 
    where
        to_delete_.employee_fk in (select
            e1_0.id from employees e1_0 
        where
            e1_0.id=1 
            and e1_0.deleted_at is null)
Hibernate: 
    update
        employees e1_0 
    set
        deleted_at=localtimestamp 
    where
        e1_0.id=1 
        and e1_0.deleted_at is null

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https://hibernate.atlassian.net/browse/HHH-19192