MM-34871 CRT: Participants of thread include non-replying followers (and past followers) (#17447)

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

store/opentracinglayer/opentracinglayer.go

@@ -8812,7 +8812,7 @@ func (s *OpenTracingLayerThreadStore) GetThreadsForUser(userId string, teamID st
 	return result, err
 }
 
-func (s *OpenTracingLayerThreadStore) MaintainMembership(userID string, postID string, following bool, incrementMentions bool, updateFollowing bool, updateViewedTimestamp bool) (*model.ThreadMembership, error) {
+func (s *OpenTracingLayerThreadStore) MaintainMembership(userID string, postID string, following bool, incrementMentions bool, updateFollowing bool, updateViewedTimestamp bool, updateParticipants bool) (*model.ThreadMembership, error) {
 	origCtx := s.Root.Store.Context()
 	span, newCtx := tracing.StartSpanWithParentByContext(s.Root.Store.Context(), "ThreadStore.MaintainMembership")
 	s.Root.Store.SetContext(newCtx)
@@ -8821,7 +8821,7 @@ func (s *OpenTracingLayerThreadStore) MaintainMembership(userID string, postID s
 	}()
 
 	defer span.Finish()
-	result, err := s.ThreadStore.MaintainMembership(userID, postID, following, incrementMentions, updateFollowing, updateViewedTimestamp)
+	result, err := s.ThreadStore.MaintainMembership(userID, postID, following, incrementMentions, updateFollowing, updateViewedTimestamp, updateParticipants)
 	if err != nil {
 		span.LogFields(spanlog.Error(err))
 		ext.Error.Set(span, true)