Make it so you can't use any item to cancel mechanical surgery (#1989)

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## About The Pull Request

Right now if you click an ipc surgery with anything that is not the
right item it "screw" the shell and force you to restart teh surgery
which is a pain. (it applies to EVERY item like even gause).
You can still close the shell with a knife if you don't have a
screwdriver.

## Why It's Good For The Game

Said above

## Changelog

:cl:
tweak: Mechanical surgery won't cancel at any wrong move.
/:cl:

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---------

Signed-off-by: ritorizo <41831966+ritorizo@users.noreply.github.com>
Co-authored-by: ritorizo <ritorizo@localhost>
Co-authored-by: Mark Suckerberg <mark@suckerberg.gay>

code/modules/surgery/mechanic_steps.dm

@@ -5,7 +5,7 @@
 		TOOL_SCREWDRIVER		= 100,
 		TOOL_SCALPEL 			= 75, // med borgs could try to unscrew shell with scalpel
 		/obj/item/kitchen/knife	= 50,
-		/obj/item				= 10) // 10% success with any sharp item.
+		/obj/item				= 10)
 	time = 2.4 SECONDS
 	preop_sound = 'sound/items/screwdriver.ogg'
 	success_sound = 'sound/items/screwdriver2.ogg'
@@ -16,11 +16,11 @@
 			"<span class='notice'>[user] begins to unscrew the shell of [target]'s [parse_zone(target_zone)].</span>")
 
 /datum/surgery_step/mechanic_open/tool_check(mob/user, obj/item/tool)
-	if(istype(tool))
-		preop_sound = tool.usesound
-	else if(!tool.get_sharpness()) //if its not a tool, then we check if its sharp
+	if(implement_type == /obj/item && !tool.get_sharpness())
 		return FALSE
-	. = ..()
+	if(tool.usesound)
+		preop_sound = tool.usesound
+	return ..()
 
 //close shell
 /datum/surgery_step/mechanic_close
@@ -29,7 +29,7 @@
 		TOOL_SCREWDRIVER		= 100,
 		TOOL_SCALPEL 			= 75,
 		/obj/item/kitchen/knife	= 50,
-		/obj/item				= 10) // 10% success with any sharp item.
+		/obj/item				= 10)
 	time = 2.4 SECONDS
 	preop_sound = 'sound/items/screwdriver.ogg'
 	success_sound = 'sound/items/screwdriver2.ogg'
@@ -40,11 +40,11 @@
 			"<span class='notice'>[user] begins to screw the shell of [target]'s [parse_zone(target_zone)].</span>")
 
 /datum/surgery_step/mechanic_close/tool_check(mob/user, obj/item/tool)
-	if(istype(tool))
-		preop_sound = tool.usesound
-	else if(!tool.get_sharpness()) //if its not a tool, then we check if its sharp
+	if(implement_type == /obj/item && !tool.get_sharpness())
 		return FALSE
-	. = ..()
+	if(tool.usesound)
+		preop_sound = tool.usesound
+	return ..()
 
 //prepare electronics
 /datum/surgery_step/prepare_electronics