Viscerators no longer feature active camouflage (bugfix) (#72826)

## About The Pull Request

#72517 removed Viscerators icon state, thus making them invisible, this
adds the icon state back to them.

Fixes https://github.com/tgstation/tgstation/issues/72839

## Why It's Good For The Game

Viscerators are not supposed to be invisible.
## Changelog
🆑
fix: Viscerators are no longer invisible.
/🆑

code/modules/mob/living/basic/syndicate/syndicate.dm

@@ -224,6 +224,8 @@
 /mob/living/basic/viscerator
 	name = "viscerator"
 	desc = "A small, twin-bladed machine capable of inflicting very deadly lacerations."
+	icon_state = "viscerator_attack"
+	icon_living = "viscerator_attack"
 	pass_flags = PASSTABLE | PASSMOB
 	combat_mode = TRUE
 	mob_biotypes = MOB_ROBOTIC