Use Doctrine for the opens and clicks exporters

This commit refactors the code that handles exporting e-mails opens and
clicks when generating the personal data file to use Doctrine instead of
Paris. I opted to do this in this task as opens and clicks code share
some functionality, and I didn't want to add more code that relies on
Paris, as we are eventually going to remove it.

[MAILPOET-3738]

lib/Statistics/StatisticsOpensRepository.php

@@ -8,6 +8,7 @@ use MailPoet\Entities\StatisticsNewsletterEntity;
 use MailPoet\Entities\StatisticsOpenEntity;
 use MailPoet\Entities\SubscriberEntity;
 use MailPoetVendor\Carbon\Carbon;
+use MailPoetVendor\Doctrine\ORM\QueryBuilder;
 
 /**
  * @extends Repository<StatisticsOpenEntity>
@@ -86,4 +87,15 @@ class StatisticsOpensRepository extends Repository {
       ->setParameter('updatedAt', null)
       ->getQuery()->execute();
   }
+
+  public function getAllForSubscriber(SubscriberEntity $subscriber): QueryBuilder {
+    return $this->entityManager->createQueryBuilder()
+      ->select('opens.id id, queue.newsletterRenderedSubject, opens.createdAt, userAgent.userAgent')
+      ->from(StatisticsOpenEntity::class, 'opens')
+      ->join('opens.queue', 'queue')
+      ->leftJoin('opens.userAgent', 'userAgent')
+      ->where('opens.subscriber = :subscriber')
+      ->orderBy('queue.newsletterRenderedSubject')
+      ->setParameter('subscriber', $subscriber->getId());
+  }
 }