Updated Upstream (Paper)

Upstream has released updates that appear to apply and compile correctly

Paper Changes:
PaperMC/Paper@64828f3 Clean up thread pool usage (#11681)
PaperMC/Paper@5ab6789 Copy dispatcher root children before passing it into async tree building
PaperMC/Paper@47f2071 Deprecate ChatVisibility#UNKNOWN (#11683)

gradle.properties

@@ -2,7 +2,7 @@ group = org.purpurmc.purpur
 version = 1.21.3-R0.1-SNAPSHOT
 
 mcVersion = 1.21.3
-paperCommit = 9953384d89548c0c53a57e2a60abace9ad19b177
+paperCommit = 47f207135044e8835c529561d0d0029f0ae3fba8
 
 org.gradle.caching = true
 org.gradle.parallel = true

patches/server/0042-Skip-events-if-there-s-no-listeners.patch

@@ -5,18 +5,18 @@ Subject: [PATCH] Skip events if there's no listeners
 
 
 diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
-index 260350422fc724ba5cd5769cbb387b6007f36a84..b7783480cc6a51a1f18789b7f3fc35faf5573f8d 100644
+index 5f3669e3eb371d65dd27c37053d4bc5640d93774..bb82e6519e6f1a6a8d87fb6293681fe32b39a6a1 100644
 --- a/src/main/java/net/minecraft/commands/Commands.java
 +++ b/src/main/java/net/minecraft/commands/Commands.java
-@@ -514,6 +514,7 @@ public class Commands {
+@@ -511,6 +511,7 @@ public class Commands {
      private void runSync(ServerPlayer player, Collection<String> bukkit, RootCommandNode<SharedSuggestionProvider> rootcommandnode) {
          // Paper end - Perf: Async command map building
          new com.destroystokyo.paper.event.brigadier.AsyncPlayerSendCommandsEvent<CommandSourceStack>(player.getBukkitEntity(), (RootCommandNode) rootcommandnode, true).callEvent(); // Paper - Brigadier API
 +        if (PlayerCommandSendEvent.getHandlerList().getRegisteredListeners().length > 0) { // Purpur - skip all this crap if there's nothing listening
          PlayerCommandSendEvent event = new PlayerCommandSendEvent(player.getBukkitEntity(), new LinkedHashSet<>(bukkit));
          event.getPlayer().getServer().getPluginManager().callEvent(event);
 
-@@ -524,6 +525,7 @@ public class Commands {
+@@ -521,6 +522,7 @@ public class Commands {
              }
          }
          // CraftBukkit end