Converts 3 components into elements (#94589)

## About The Pull Request

`adjust_fishing_difficulty` is a good one to make into a bespoke element
since a number of the same clothing item are created in the wardrobe
system.

climb_walkable is also good due to how prevalent it is, and it is a bit
of a two for one since it also removes the need for the
`/component/connect_loc_behalf`

Also stops adding the on_climbable trait to literally everything in the
turf, it now only applies it to atoms with density. So no more pipes and
stuff getting trait lists created for no reason.

<details><summary> Tested + things still work as before </summary>

<img width="422" height="122" alt="image"
src="https://github.com/user-attachments/assets/b23696f5-cd16-4150-aeb3-14ea6bd256fc"
/>

</details>

## Why It's Good For The Game

Lessens overhead, fixes a bug as well.

## Changelog

🆑
fix: fixes a pushed crate not removing on_climbable trait properly off
the mob standing atop it
/🆑

code/modules/mod/modules/modules_general.dm

@@ -1008,14 +1008,14 @@
 	var/obj/item/gloves = mod.get_part_from_slot(ITEM_SLOT_GLOVES)
 	if(!gloves)
 		return
-	gloves.AddComponent(/datum/component/adjust_fishing_difficulty, -5)
+	gloves.AddElement(/datum/element/adjust_fishing_difficulty, -5)
 	if(equipped)
 		gloves.AddComponent(/datum/component/profound_fisher, equipped, delete_rod_when_deleted = FALSE)
 
 /obj/item/mod/module/fishing_glove/on_part_deactivation(deleting = FALSE)
 	var/obj/item/gloves = mod.get_part_from_slot(ITEM_SLOT_GLOVES)
 	if(gloves && !deleting)
-		qdel(gloves.GetComponent(/datum/component/adjust_fishing_difficulty))
+		gloves.RemoveElement(/datum/element/adjust_fishing_difficulty)
 		qdel(gloves.GetComponent(/datum/component/profound_fisher))
 
 /obj/item/mod/module/shock_absorber