General maintenance for mecha RCD (#88614)

## About The Pull Request
**1. Code Improvements**
 - Converted `rcd_range` from a var into a define to save memory
- Removed var `rcd_type` as it was redundant with the type of
`internal_rcd` var
- Moved attack chain code from `attackby()` to `interact_with_atom()`
when installing disk upgrade

**2. Fixes**
Fixes
https://github.com/tgstation/tgstation/pull/88589#issuecomment-2552405018,
https://github.com/tgstation/tgstation/pull/88589#issuecomment-2552294674.
i.e. the RCD cancels it's construction & deconstruction action if
   - The mech rotates away from where its building
   - The mech moves

## Changelog
🆑
code: improved code for mecha rcd
fix: mecha rcd will cancel its action when the mech is rotated or moves
during the action
/🆑

code/game/objects/items/rcd/RCD.dm

@@ -565,6 +565,18 @@
 		return owner.ui_status(user)
 	return UI_CLOSE
 
+/obj/item/construction/rcd/exosuit/build_delay(mob/user, delay, atom/target)
+	if(delay <= 0)
+		return TRUE
+
+	var/obj/item/mecha_parts/mecha_equipment/rcd/module = loc
+
+	//deconstruction can't be cancelled by ui changes
+	if(mode != RCD_DECONSTRUCT)
+		blueprint_changed = FALSE
+
+	return module.do_after_mecha(target, user, delay)
+
 /obj/item/construction/rcd/exosuit/get_matter(mob/user)
 	if(silo_link)
 		return ..()

code/game/objects/items/rcd/RHD.dm

@@ -63,6 +63,8 @@
 	return do_after(user, delay, target, extra_checks = CALLBACK(src, PROC_REF(blueprint_change)))
 
 /obj/item/construction/proc/blueprint_change()
+	PRIVATE_PROC(TRUE)
+
 	return !blueprint_changed
 
 ///used for examining the RCD and for its UI