SPIGOT-6508: Rename conflicted getServer

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

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

@@ -31,7 +31,7 @@
 +                    }
 +
 +                    InventoryMoveItemEvent event = new InventoryMoveItemEvent(tileentitydispenser.getOwner().getInventory(), oitemstack.clone(), destinationInventory, true);
-+                    worldserver.getServer().getPluginManager().callEvent(event);
++                    worldserver.getCraftServer().getPluginManager().callEvent(event);
 +                    if (event.isCancelled()) {
 +                        return;
 +                    }