Use getLocalPlayers for PhantomSpawner

Using the entire world player list will almost certainly
result in tripping thread checks.

Author: Spottedleaf

folia-server/minecraft-patches/features/0001-Region-Threading-Base.patch

@@ -19005,7 +19005,7 @@ index c2e37714bae008087b0b5086e51d675beb672ca4..4b8b71f07096b27f3508b637eedcf2be
 
                      if (days >= level.paperConfig().entities.behavior.pillagerPatrols.start.day && level.isBrightOutside()) {
 diff --git a/net/minecraft/world/level/levelgen/PhantomSpawner.java b/net/minecraft/world/level/levelgen/PhantomSpawner.java
-index d2e674b046bcf82a239b4706c3b89197ec6749c8..a7f56126a26e1fca86c39d8d656b648f5d6bb4ca 100644
+index d2e674b046bcf82a239b4706c3b89197ec6749c8..0cafe46e9a1b053c5e70f20a26b4402632d0f8bf 100644
 --- a/net/minecraft/world/level/levelgen/PhantomSpawner.java
 +++ b/net/minecraft/world/level/levelgen/PhantomSpawner.java
 @@ -19,7 +19,7 @@ import net.minecraft.world.level.block.state.BlockState;
@@ -19017,7 +19017,7 @@ index d2e674b046bcf82a239b4706c3b89197ec6749c8..a7f56126a26e1fca86c39d8d656b648f
 
      @Override
      public void tick(ServerLevel level, boolean spawnEnemies, boolean spawnFriendlies) {
-@@ -31,12 +31,13 @@ public class PhantomSpawner implements CustomSpawner {
+@@ -31,15 +31,16 @@ public class PhantomSpawner implements CustomSpawner {
                  }
                  // Paper end - Ability to control player's insomnia and phantoms
                  RandomSource randomSource = level.random;
@@ -19033,7 +19033,11 @@ index d2e674b046bcf82a239b4706c3b89197ec6749c8..a7f56126a26e1fca86c39d8d656b648f
 +                    worldData.phantomSpawnerNextTick += (spawnAttemptMinSeconds + randomSource.nextInt(spawnAttemptMaxSeconds - spawnAttemptMinSeconds + 1)) * 20; // Folia - region threading
                      // Paper end - Ability to control player's insomnia and phantoms
                      if (level.getSkyDarken() >= 5 || !level.dimensionType().hasSkyLight()) {
-                         for (ServerPlayer serverPlayer : level.players()) {
+-                        for (ServerPlayer serverPlayer : level.players()) {
++                        for (ServerPlayer serverPlayer : level.getLocalPlayers()) { // Folia - region threading
+                             if (!serverPlayer.isSpectator() && (!level.paperConfig().entities.behavior.phantomsDoNotSpawnOnCreativePlayers || !serverPlayer.isCreative())) { // Paper - Add phantom creative and insomniac controls
+                                 BlockPos blockPos = serverPlayer.blockPosition();
+                                 if (!level.dimensionType().hasSkyLight() || blockPos.getY() >= level.getSeaLevel() && level.canSeeSky(blockPos)) {
 diff --git a/net/minecraft/world/level/levelgen/feature/EndPlatformFeature.java b/net/minecraft/world/level/levelgen/feature/EndPlatformFeature.java
 index dfe8b815987a0ee385846616e4845428a81f2782..49b810ae9d9a8d0718a5f8c512e15a5573ed04fd 100644
 --- a/net/minecraft/world/level/levelgen/feature/EndPlatformFeature.java