title: groupBy and addGroupBy does not group up
body: <p>I am trying to group products with deleted and non deleted items, but code does not work(also not crushes), tried to group by categories but still does not work... any idea?</p>
  <pre><code>const sales =  await getRepository(Sales)
          .createQueryBuilder('sales')
          .where(&quot;sales.selfMerchantId = :id&quot;, {id: user.id})
          .groupBy(&quot;sales.deleted_at&quot;)
          .addGroupBy(&quot;sales.id&quot;)
          .withDeleted()
          .getMany();
  
  
      return sales;
  </code></pre>