Refactors various item attack() implementations

Replaced some attack() overrides with apply_hit_effect() or other attack
procs where appropriate.
Removed the attack() override from reagent_containers.

Conflicts:
	code/game/objects/items/weapons/clown_items.dm
	code/game/objects/items/weapons/material/kitchen.dm
	code/game/objects/items/weapons/stunbaton.dm
	code/modules/mob/living/carbon/human/human_defense.dm
	code/modules/mob/living/carbon/human/species/xenomorphs/alien_facehugger.dm
	code/modules/mob/living/simple_animal/friendly/spiderbot.dm
	code/modules/mob/living/simple_animal/simple_animal.dm

code/game/objects/items/weapons/material/material_weapons.dm

@@ -64,9 +64,7 @@
 	processing_objects -= src
 	..()
 
-/obj/item/weapon/material/attack()
-	if(!..())
-		return
+/obj/item/weapon/material/apply_hit_effect()
 	if(!unbreakable)
 		if(material.is_brittle())
 			health = 0

code/game/objects/items/weapons/material/misc.dm

@@ -65,7 +65,6 @@
 	icon = 'icons/obj/weapons.dmi'
 	icon_state = "hoe"
 	item_state = "hoe"
-	flags = CONDUCT | NOBLUDGEON
 	force_divisor = 0.25 // 5 with weight 20 (steel)
 	thrown_force_divisor = 0.25 // as above
 	w_class = 2