Readd chunk priority patch, including many chunk system fixes from tuinity (#6488)

patches/server/Optimize-Light-Engine.patch

@@ -29,8 +29,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/net/minecraft/server/level/ChunkHolder.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java
 @@ -0,0 +0,0 @@ public class ChunkHolder {
- 
-         this.onLevelChange.onLevelChange(this.pos, this::getQueueLevel, this.ticketLevel, this::setQueueLevel);
+         }
+         // Paper end
          this.oldTicketLevel = this.ticketLevel;
 +        //chunkMap.level.getChunkSource().getLightEngine().queue.changePriority(pos.toLong(), this.queueLevel, priority); // Paper // Restore this in chunk priority later?
          // CraftBukkit start
@@ -167,15 +167,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    // Paper start
 +    private static final int MAX_PRIORITIES = ChunkMap.MAX_CHUNK_DISTANCE + 2;
 +
-+    private boolean isChunkLightStatus(long pair) {
-+        ChunkHolder playerChunk = playerChunkMap.getVisibleChunkIfPresent(pair);
-+        if (playerChunk == null) {
-+            return false;
-+        }
-+        ChunkStatus status = ChunkHolder.getStatus(playerChunk.getTicketLevel());
-+        return status != null && status.isOrAfter(ChunkStatus.LIGHT);
-+    }
-+
 +    static class ChunkLightQueue {
 +        public boolean shouldFastUpdate;
 +        java.util.ArrayDeque<Runnable> pre = new java.util.ArrayDeque<Runnable>();
@@ -341,11 +332,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        IntSupplier prioritySupplier = playerChunkMap.getChunkQueueLevel(pair);
 +        boolean[] skippedPre = {false};
 +        this.queue.addChunk(pair, prioritySupplier, Util.name(() -> {
-+            if (!isChunkLightStatus(pair)) {
-+                future.complete(chunk);
-+                skippedPre[0] = true;
-+                return;
-+            }
 +            // Paper end
              LevelChunkSection[] levelChunkSections = chunk.getSections();