Makes borg deconstruction drop installed upgrades and an exoskeleton …

…(again) (tgstation#86480)

## About The Pull Request

Borg upgrades would vanish upon deconstruction via lockdown-wrench
pipeline, which is inconsistent with them being dropped upon a module
change, and it's also kinda scummy.
Exoskeletons were not being dropped upon such deconstruction because
some melbert guy codered too hard i think haha whoops (tgstation#76583)
also made borg exoskeleton's part removal process use head and chest's
`drop_organs()` to handle flash/cell/wiring removal. it seems to be
neater but i could be wrong

## Why It's Good For The Game

Fixes tgstation#59647 
Makes the exoskeleton (the most expensive and vital borg shell piece)
drop upon deconstruction again which is nice and cool

## Changelog

:cl:
fix: fixed borg exoskeletons not dropping when a borg is manually
deconstructed
fix: borg upgrade modules are now dropped when a borg is deconstructed
/:cl:

Co-authored-by: Ghom <[email protected]>

code/game/objects/items/robot/robot_parts.dm

@@ -121,14 +121,11 @@
 
 	if(chest)
 		chest.forceMove(drop_to)
-		new /obj/item/stack/cable_coil(drop_to, 1)
-		chest.wired = FALSE
-		chest.cell?.forceMove(drop_to)
+		chest.drop_organs()
 
 	if(head)
-		head.flash1?.forceMove(drop_to)
-		head.flash2?.forceMove(drop_to)
 		head.forceMove(drop_to)
+		head.drop_organs()
 
 /obj/item/robot_suit/proc/put_in_hand_or_drop(mob/living/user, obj/item/I) //normal put_in_hands() drops the item ontop of the player, this drops it at the suit's loc
 	if(!user.put_in_hands(I))

code/modules/mob/living/silicon/robot/robot.dm

@@ -504,14 +504,19 @@
 	lampButton?.update_appearance()
 	update_icons()
 
+///Completely deconstructs the borg, dropping the MMI/posibrain, removing applied upgrades and stripping the exoskeleton of all limbs,
+///while also burning out the flashes and prying out the cabling and the cell used in construction
 /mob/living/silicon/robot/proc/cyborg_deconstruct()
 	SEND_SIGNAL(src, COMSIG_BORG_SAFE_DECONSTRUCT)
 	if(shell)
 		undeploy()
 	var/turf/drop_to = drop_location()
-	if (robot_suit)
+	//remove installed upgrades
+	for(var/obj/item/borg/upgrade/upgrade_to_remove in upgrades)
+		upgrade_to_remove.forceMove(drop_to)
+	if(robot_suit)
 		robot_suit.drop_all_parts(drop_to)
-
+		robot_suit.forceMove(drop_to)
 	else
 		new /obj/item/robot_suit(drop_to)
 		new /obj/item/bodypart/leg/left/robot(drop_to)