Wendigo Cave Ruin & Domain Aesthetic Refresh + Wendigo Corpse Fix (#80334)

## About The Pull Request

Updates the Wendigo Cave ruin on Ice Box and it's domain to be more
detailed, without changing the shape of the arena too much. Also fixes
the Wendigo attacking corpses,


![image](https://github.com/tgstation/tgstation/assets/86125936/f6720c48-a139-46a2-92d6-d9d83fd4672a)

![image](https://github.com/tgstation/tgstation/assets/86125936/36281f17-d853-40bb-b08e-c6ae0254dcc8)
And the domain!

![image](https://github.com/tgstation/tgstation/assets/86125936/441886d8-816e-4de8-b54b-0fa4f57e3a93)
## Why It's Good For The Game
Makes the Wendigo arena and the surrounding area more varied visually,
as well as stopping the Wendigo from attacking the decorative corpses
used in the domain.

(Previous Arena for reference)

![image](https://github.com/tgstation/tgstation/assets/86125936/346da0eb-9d16-430b-91bb-970f84d52826)

## Changelog
🆑
qol: Wendigo Cave ruin gets an aesthetic refresh
fix: Wendigos (Wendigi?) no longer attack corpses

/🆑

code/modules/mob_spawn/corpses/job_corpses.dm

@@ -84,3 +84,7 @@
 	outfit = /datum/outfit/job/roboticist
 	icon_state = "corpseroboticist"
 
+/obj/effect/mob_spawn/corpse/human/bitrunner
+	name = JOB_BITRUNNER
+	outfit = /datum/outfit/job/bitrunner
+	icon_state = "corpsecargotech"