[Enhancement] Allow doDaylightCycle_tc control system time sync

[yezhiyi9670]

Currently, when system time sync is enabled, there is no way to stop daylight cycle without changing configuration, and the doDaylightCycle_tc gamerule will just do nothing.

It would make sense to have doDaylightCycle_tc also control system time sync (stop syncing and allow /time set when doDaylightCycle_tc is false).