Lithium hopper optimizations broken/disabled by chunk system entity management rewrite

[barnabwhy]

fixed by setting mixin.util.entity_movement_tracking=false in lithium config

Crash log:

[16:32:47] [Server thread/INFO]: [STDOUT]: Lithium Cached BlockState Flags are disabled!
[16:32:47] [Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.class_148: Ticking block entity
        at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:1025) ~[server-intermediary.jar:?]
        at net.minecraft.class_3176.method_3813(class_3176.java:299) ~[server-intermediary.jar:?]
        at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:912) ~[server-intermediary.jar:?]
        at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:697) ~[server-intermediary.jar:?]
        at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:281) ~[server-intermediary.jar:?]
        at java.base/java.lang.Thread.run(Thread.java:1570) [?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "me.jellysquid.mods.lithium.mixin.util.entity_movement_tracking.ServerEntityManagerAccessor.getCache()" because the return value of "me.jellysquid.mods.lithium.mixin.util.entity_movement_tracking.ServerWorldAccessor.getEntityManager()" is null
        at me.jellysquid.mods.lithium.common.entity.movement_tracker.SectionedEntityMovementTracker.register(SectionedEntityMovementTracker.java:85) ~[lithium-fabric-mc1.21.1-0.13.0.jar:?]
        at me.jellysquid.mods.lithium.common.entity.movement_tracker.SectionedInventoryEntityMovementTracker.registerAt(SectionedInventoryEntityMovementTracker.java:25) ~[lithium-fabric-mc1.21.1-0.13.0.jar:?]
        at net.minecraft.class_2614.initExtractInventoryTracker(class_2614.java:1104) ~[server-intermediary.jar:?]
        at net.minecraft.class_2614.redirect$znj000$lithium$getExtractInventory(class_2614.java:622) ~[server-intermediary.jar:?]
        at net.minecraft.class_2614.method_11241(class_2614.java:219) ~[server-intermediary.jar:?]
        at net.minecraft.class_2614.method_31691(class_2614.java:107) ~[server-intermediary.jar:?]
        at net.minecraft.class_2614.method_11243(class_2614.java:123) ~[server-intermediary.jar:?]
        at net.minecraft.class_2614.method_31692(class_2614.java:107) ~[server-intermediary.jar:?]
        at net.minecraft.class_2818$class_5563.method_31703(class_2818.java:691) ~[server-intermediary.jar:?]
        at net.minecraft.class_2818$class_5564.method_31703(class_2818.java:745) ~[server-intermediary.jar:?]
        at net.minecraft.class_1937.redirect$bdi000$moonrise$newBlockEntityTick(class_1937.java:5144) ~[server-intermediary.jar:?]
        at net.minecraft.class_1937.method_18471(class_1937.java:482) ~[server-intermediary.jar:?]
        at net.minecraft.class_3218.method_18765(class_3218.java:413) ~[server-intermediary.jar:?]
        at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:1021) ~[server-intermediary.jar:?]
        ... 5 more

[jpenilla]

The problem with disabling this mixin is that lithium's hopper optimizations depend on it. Most of what we disable is also optimized by Moonrise, but hoppers aren't. I'd like to fix this properly as hopper optimizations are one of the big reasons to use lithium, but doing so seems non-trivial. Maybe we should just disable the mixin for now and rename this issue to something like Lithium hopper optimizations broken/disabled by chunk system entity management rewrite, leaving it open until it's properly fixed or we implement our own hopper optimizations. (as a side note, hoppers should still be better than vanilla due to our optimizations to general entity lookups and other areas)