/obj/item/clothing/head/mob_holder -> /obj/item/mob_holder (#91893)

## About The Pull Request
title
## Why It's Good For The Game
it inherits a lot of behavior from clothing which leads to lots of bugs
when it isn't actually clothes, for example: shredded overlays. this
should be better.
probably fixes a bunch of bugs
## Changelog
🆑
code: mob holders are no longer subtypes of clothes, report any issues
/🆑

---------

Co-authored-by: Jacquerel <hnevard@gmail.com>

code/modules/holodeck/computer.dm

@@ -73,7 +73,7 @@ GLOBAL_LIST_INIT(typecache_holodeck_linked_floorcheck_ok, typecacheof(list(/turf
 
 	///special locs that can mess with derez'ing holo spawned objects
 	var/list/special_locs = list(
-		/obj/item/clothing/head/mob_holder,
+		/obj/item/mob_holder,
 	)
 
 	///TRUE if the holodeck is using extra power because of a program, FALSE otherwise