SPIGOT-6508: Rename conflicted getServer

By: md_5 <git@md-5.net>

paper-server/nms-patches/net/minecraft/world/level/block/LayeredCauldronBlock.patch

@@ -53,7 +53,7 @@
 +                world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()),
 +                (entity == null) ? null : entity.getBukkitEntity(), reason, newState
 +        );
-+        world.getServer().getPluginManager().callEvent(event);
++        world.getCraftServer().getPluginManager().callEvent(event);
 +        if (event.isCancelled()) {
 +            return false;
 +        }