[MIRROR] Prevents npcs from making progress bars (#2737)

* Prevents npcs from making progress bars (#82413)

## About The Pull Request
A lot of lavaland mobs constantly make progress bars. Discovered this
while working on another PR.


![image](https://github.com/tgstation/tgstation/assets/42397676/2fc57cff-7e7e-46ea-8956-83c4ba44c69b)

Put a breakpoint in progressbar/New to see what I mean.
## Why It's Good For The Game
They can't even see them. Why are we making these? In case someone swaps
in? That seems a bit too rare to justify this
## Changelog
N/A literally nothing player facing

* Prevents npcs from making progress bars

---------

Co-authored-by: NovaBot <[email protected]>
Co-authored-by: Jeremiah <[email protected]>
Co-authored-by: Bloop <[email protected]>

code/__HELPERS/mobs.dm

@@ -281,7 +281,8 @@ GLOBAL_LIST_EMPTY(species_list)
 
 	var/datum/progressbar/progbar
 	if(progress)
-		progbar = new(user, delay, target || user)
+		if(user.client)
+			progbar = new(user, delay, target || user)
 
 	SEND_SIGNAL(user, COMSIG_DO_AFTER_BEGAN)