[framework] EntityLog no longers logs collection without change (#3375)

Co-authored-by: Milan Staňo <milan.stano@shopsys.com>

src/Component/EntityLog/ChangeSet/ChangeSetResolver.php

@@ -144,6 +144,10 @@ public function resolveChangesOnCollectionForEntity(array $scheduledCollections,
                 ));
             }
 
+            if (count($collectionChanges->deletedItems) === 0 && count($collectionChanges->insertedItems) === 0) {
+                continue;
+            }
+
             $assoc = $scheduledCollection->getMapping();
             $collectionFieldName = $assoc['fieldName'];
             $resolvedChangedCollections[$collectionFieldName] = $collectionChanges;