SPIGOT-6508: Rename conflicted getServer

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

paper-server/nms-patches/net/minecraft/server/commands/CommandTeleport.patch

@@ -30,7 +30,7 @@
 +                // CraftBukkit start - Teleport event
 +                Location to = new Location(worldserver.getWorld(), d0, d1, d2, f2, f4);
 +                EntityTeleportEvent event = new EntityTeleportEvent(entity.getBukkitEntity(), entity.getBukkitEntity().getLocation(), to);
-+                worldserver.getServer().getPluginManager().callEvent(event);
++                worldserver.getCraftServer().getPluginManager().callEvent(event);
 +                if (event.isCancelled()) {
 +                    return;
 +                }