Guncode Agony 4.4: Armor as an argument (#88143)

## About The Pull Request
Lil cleanup/tweak I couldn't do in the main PR because it conflicted
before and i forgot after. Yes this works with overrides that don't have
the arg, yes I tested it.

## Why It's Good For The Game
Don't run armor code thrice please thank you

## Changelog
🆑
code: Projectile impacts no longer fetch mobs' armor values thrice
/🆑

code/modules/modular_computers/computers/machinery/modular_computer.dm

@@ -187,6 +187,6 @@
 // "Burn" damage is equally strong against internal components and exterior casing
 // "Brute" damage mostly damages the casing.
 /obj/machinery/modular_computer/bullet_act(obj/projectile/proj)
-	return cpu?.bullet_act(proj) || ..()
+	return cpu?.projectile_hit(proj) || ..()
 
 #undef CPU_INTERACTABLE