Add and use FeatureHooks.getAllEntities

The ServerLevel#getAllEntities function only returns entities which
are accessible. FeatureHooks#getAllEntities will return all
entities, whether or not they are accessible.

Use the new hook in the EntityCommand, which allows server admins
to inspect entities in unloaded chunks.

Use the hook as well for ticking the EntityScheduler. This fixes
an issue whether unloaded entities did not have their scheduler ticked.

paper-server/src/main/java/io/papermc/paper/command/subcommands/EntityCommand.java

@@ -1,6 +1,7 @@
 package io.papermc.paper.command.subcommands;
 
 import com.google.common.collect.Maps;
+import io.papermc.paper.FeatureHooks;
 import io.papermc.paper.command.CommandUtil;
 import io.papermc.paper.command.PaperSubcommand;
 import java.util.Collections;
@@ -9,7 +10,6 @@ import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
-
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.event.ClickEvent;
 import net.kyori.adventure.text.event.HoverEvent;
@@ -102,7 +102,7 @@ public final class EntityCommand implements PaperSubcommand {
             ServerLevel world = ((CraftWorld) bukkitWorld).getHandle();
             Map<ResourceLocation, Integer> nonEntityTicking = Maps.newHashMap();
             ServerChunkCache chunkProviderServer = world.getChunkSource();
-            world.getAllEntities().forEach(e -> {
+            FeatureHooks.getAllEntities(world).forEach(e -> {
                 ResourceLocation key = EntityType.getKey(e.getType());
 
                 MutablePair<Integer, Map<ChunkPos, Integer>> info = list.computeIfAbsent(key, k -> MutablePair.of(0, Maps.newHashMap()));