Adds Type 80 UPP bayonets to CLF who lack knives

[BasilHerb]

About the pull request

The purpose of this PR is to add knives to the CLF ERTs who currently lack them. I have tested these changes on a private server, spawning each CLF mob and looking at whether they have bayonets or not. To the extent of my knowledge, all CLF should now spawn with bayonets on their mouth, with exception to the CLF Cell Commander (who has UPP boots), and the CLF Survivor (who spawns with an M5 raider knife, which I do not know how to change.)

Explain why it's good for the game

Dying to shrapnel because you got shot once by PVT Stanley or your teammate is extremely sad and depressing, and by adding knives we will finally be free of this oppression. Also, loads of people keep complaining about it.

Testing Photographs and Procedure

Changelog

🆑
add: Type 80 bayonet to the mouths of the following mobs: CLF Soldier, CLF Specialist, CLF Medic, CLF Engineer, CLF Leader.
/:cl:

[Drulikar]

For future reference should you want to do it later:

    // Swap out M5 raider with a Type 80
    var/obj/item/storage/pouch = new_human.get_item_by_slot(WEAR_L_STORE)
    var/obj/item/attachable/bayonet/knife = locate() in pouch
    if(!pouch.remove_from_storage(knife))
        return
    qdel(knife)
    pouch.handle_item_insertion(new /obj/item/attachable/bayonet/upp)

added after ..() in /datum/equipment_preset/survivor/clf/load_gear(mob/living/carbon/human/new_human) would swap out the CLF survivor knife.