replaces the health variable for fishes with integrity (#92192)

## About The Pull Request
Because fish is an item, it inherits the use of integrity from objects,
however it also has its own health variable. For consistency, ~~damaging
its integrity should also lower its health and healing it should also
recover its integrity. Fish has a max integrity that's double its
health.
I've also renamed `adjust_health` to `set_health` since it doesn't
adjust the health by the provided value but sets it to said value.~~
I've scrapped the latter to instead use integrity.

## Why It's Good For The Game
A small bit of consistency. If you shoot a fish with a laser gun,
wouldn't it die?

(cherry picked from commit 940d73aeae)

code/game/objects/items/stacks/tape.dm

@@ -186,6 +186,10 @@
 	if(!isobj(interacting_with) || iseffect(interacting_with))
 		return NONE
 
+	if(HAS_TRAIT(interacting_with, TRAIT_DUCT_TAPE_UNREPAIRABLE))
+		user.balloon_alert(user, "cannot be repaired with duct tape!")
+		return ITEM_INTERACT_BLOCKING
+
 	var/obj/item/object_to_repair = interacting_with
 	var/object_is_damaged = object_to_repair.get_integrity() < object_to_repair.max_integrity