Don't broadcast messages to command blocks

Previously the broadcast method would update the last output
in command blocks, and if called asynchronously, would throw
an error

paper-server/patches/sources/net/minecraft/world/level/BaseCommandBlock.java.patch

@@ -20,7 +20,15 @@
                      } catch (Throwable throwable) {
                          CrashReport crashreport = CrashReport.forThrowable(throwable, "Executing command block");
                          CrashReportCategory crashreportsystemdetails = crashreport.addCategory("Command to be executed");
-@@ -200,7 +204,7 @@
+@@ -174,6 +178,7 @@
+     @Override
+     public void sendSystemMessage(Component message) {
+         if (this.trackOutput) {
++            org.spigotmc.AsyncCatcher.catchOp("sendSystemMessage to a command block"); // Paper - Don't broadcast messages to command blocks
+             SimpleDateFormat simpledateformat = BaseCommandBlock.TIME_FORMAT;
+             Date date = new Date();
+ 
+@@ -200,7 +205,7 @@
      }
  
      public InteractionResult usedBy(Player player) {