ACP2E-1965: load product attributes related to active sales rules only

Author: alzota

app/code/Magento/SalesRule/Model/ResourceModel/Rule.php

@@ -312,6 +312,10 @@ public function getActiveAttributes()
             ['ea' => $this->getTable('eav_attribute')],
             'ea.attribute_id = a.attribute_id',
             []
+        )->joinInner(
+            ['sr' => $this->getTable('salesrule')],
+            'a.' . $this->getLinkField() . ' = sr.rule_id AND sr.is_active = 1',
+            []
         );
         return $connection->fetchAll($select);
     }