Add allow-remote-ender-dragon-respawning setting (#12602)

paper-server/patches/sources/net/minecraft/world/level/dimension/end/EndDragonFight.java.patch

@@ -142,7 +142,7 @@
                  blockPos = this.portalLocation;
              }
 +            // Paper start - Perf: Do crystal-portal proximity check before entity lookup
-+            if (placedEndCrystalPos != null) {
++            if (placedEndCrystalPos != null && !level.paperConfig().misc.allowRemoteEnderDragonRespawning) {
 +                // The end crystal must be 0 or 1 higher than the portal origin
 +                int dy = placedEndCrystalPos.getY() - blockPos.getY();
 +                if (dy != 0 && dy != 1) {

paper-server/src/main/java/io/papermc/paper/configuration/WorldConfiguration.java

@@ -574,6 +574,7 @@ public class WorldConfiguration extends ConfigurationPart {
         public int shieldBlockingDelay = 5;
         public boolean disableRelativeProjectileVelocity = false;
         public boolean legacyEnderPearlBehavior = false;
+        public boolean allowRemoteEnderDragonRespawning = false;
 
         public enum RedstoneImplementation {
             VANILLA, EIGENCRAFT, ALTERNATE_CURRENT