[1.16] Make it run (#3626)

* She compiles!

Also readded the armorstand ticking patch, thanks cat

* Update mob goal api

* Misc fixes to make it run

drop per playing mob spawns for now

Spigot-Server-Patches/Paper-config-files.patch

@@ -564,7 +564,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          // Spigot end
 +        // Paper start
 +        try {
-+            com.destroystokyo.paper.PaperConfig.init((File) options.valueOf("paper-settings"));
++            com.destroystokyo.paper.PaperConfig.init((java.io.File) options.valueOf("paper-settings"));
 +        } catch (Exception e) {
 +            DedicatedServer.LOGGER.error("Unable to load server configuration", e);
 +            return false;