[MM-15356] Migrate "Channel.Update" to Sync by default (#10815)

store/storetest/mocks/ChannelStore.go

@@ -1050,19 +1050,28 @@ func (_m *ChannelStore) SetDeleteAt(channelId string, deleteAt int64, updateAt i
 }
 
 // Update provides a mock function with given fields: channel
-func (_m *ChannelStore) Update(channel *model.Channel) store.StoreChannel {
+func (_m *ChannelStore) Update(channel *model.Channel) (*model.Channel, *model.AppError) {
 	ret := _m.Called(channel)
 
-	var r0 store.StoreChannel
-	if rf, ok := ret.Get(0).(func(*model.Channel) store.StoreChannel); ok {
+	var r0 *model.Channel
+	if rf, ok := ret.Get(0).(func(*model.Channel) *model.Channel); ok {
 		r0 = rf(channel)
 	} else {
 		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(store.StoreChannel)
+			r0 = ret.Get(0).(*model.Channel)
 		}
 	}
 
-	return r0
+	var r1 *model.AppError
+	if rf, ok := ret.Get(1).(func(*model.Channel) *model.AppError); ok {
+		r1 = rf(channel)
+	} else {
+		if ret.Get(1) != nil {
+			r1 = ret.Get(1).(*model.AppError)
+		}
+	}
+
+	return r0, r1
 }
 
 // UpdateLastViewedAt provides a mock function with given fields: channelIds, userId