[MM-57991] Add log message about deleted rows from Data Retention job (#26847)

server/channels/store/timerlayer/timerlayer.go

@@ -6905,10 +6905,10 @@ func (s *TimerLayerReactionStore) DeleteAllWithEmojiName(emojiName string) error
 	return err
 }
 
-func (s *TimerLayerReactionStore) DeleteOrphanedRowsByIds(r *model.RetentionIdsForDeletion) error {
+func (s *TimerLayerReactionStore) DeleteOrphanedRowsByIds(r *model.RetentionIdsForDeletion) (int64, error) {
 	start := time.Now()
 
-	err := s.ReactionStore.DeleteOrphanedRowsByIds(r)
+	result, err := s.ReactionStore.DeleteOrphanedRowsByIds(r)
 
 	elapsed := float64(time.Since(start)) / float64(time.Second)
 	if s.Root.Metrics != nil {
@@ -6918,7 +6918,7 @@ func (s *TimerLayerReactionStore) DeleteOrphanedRowsByIds(r *model.RetentionIdsF
 		}
 		s.Root.Metrics.ObserveStoreMethodDuration("ReactionStore.DeleteOrphanedRowsByIds", success, elapsed)
 	}
-	return err
+	return result, err
 }
 
 func (s *TimerLayerReactionStore) ExistsOnPost(postId string, emojiName string) (bool, error) {