fix(communities): properly delete remove chats when handling community

updates

When channels where removed from communities by the community owner,
community members would not remove the chats in their own databases.

See https://github.com/status-im/status-desktop/issues/8000 for more
info.

This commit ensures that nodes delete removed chats from their local
chats table and also deregister the corresponding transport filters.

protocol/messenger_communities.go

@@ -1600,6 +1600,20 @@ func (m *Messenger) handleCommunityDescription(state *ReceivedMessageState, sign
 		return nil
 	}
 
+	removedChatIDs := make([]string, 0)
+	for id := range communityResponse.Changes.ChatsRemoved {
+		chatID := community.IDString() + id
+		_, ok := state.AllChats.Load(chatID)
+		if ok {
+			removedChatIDs = append(removedChatIDs, chatID)
+			state.AllChats.Delete(chatID)
+			err := m.DeleteChat(chatID)
+			if err != nil {
+				m.logger.Error("couldn't delete chat", zap.Error(err))
+			}
+		}
+	}
+
 	// Update relevant chats names and add new ones
 	// Currently removal is not supported
 	chats := CreateCommunityChats(community, state.Timesource)
@@ -1629,6 +1643,13 @@ func (m *Messenger) handleCommunityDescription(state *ReceivedMessageState, sign
 		}
 	}
 
+	for _, chatID := range removedChatIDs {
+		_, err := m.transport.RemoveFilterByChatID(chatID)
+		if err != nil {
+			m.logger.Error("couldn't remove filter", zap.Error(err))
+		}
+	}
+
 	// Load transport filters
 	filters, err := m.transport.InitPublicFilters(chatIDs)
 	if err != nil {