Part 1: Storage Improvements (#90365)

## About The Pull Request
- Removed duplicate definition of
`/obj/item/storage/contents_explosion()`
- Removed var `rummage_if_nodrop`. It's always `TRUE` and nowhere in
game is it modified so we implement its value directly
- Autodoc for procs `PopulateContents()` & `emptyStorage()`
- Deconstructing storages is faster as it drops the contents directly on
the turf instead of refreshing views, animating parent, updating
appearance & other stuff done in `removeAll()`. It also has no side
effects as presently indestructible contents is moved to the turf inside
`Destroy()`

## Changelog
🆑
code: improved storage code
/🆑

code/datums/storage/storage.dm

@@ -161,7 +161,7 @@
 /datum/storage/proc/on_deconstruct()
 	SIGNAL_HANDLER
 
-	remove_all()
+	remove_all(update_storage = FALSE)
 
 /// Automatically ran on all object insertions: flag marking and view refreshing.
 /datum/storage/proc/handle_enter(datum/source, obj/item/arrived)
@@ -552,8 +552,9 @@ GLOBAL_LIST_EMPTY(cached_storage_typecaches)
  * * obj/item/thing - the object we're removing
  * * atom/remove_to_loc - where we're placing the item
  * * silent - if TRUE, we won't play any exit sounds
+ * * visual_updates - if TRUE we update storage views & animate parent appearance
  */
-/datum/storage/proc/attempt_remove(obj/item/thing, atom/remove_to_loc, silent = FALSE)
+/datum/storage/proc/attempt_remove(obj/item/thing, atom/remove_to_loc, silent = FALSE, visual_updates = TRUE)
 	SHOULD_NOT_SLEEP(TRUE)
 
 	if(istype(thing) && ismob(parent.loc))
@@ -564,7 +565,7 @@ GLOBAL_LIST_EMPTY(cached_storage_typecaches)
 		reset_item(thing)
 		thing.forceMove(remove_to_loc)
 
-		if(do_rustle && !silent)
+		if(!silent && do_rustle)
 			if(remove_rustle_sound)
 				playsound(parent, remove_rustle_sound, 50, TRUE, -5)
 			else if(rustle_sound)
@@ -572,11 +573,12 @@ GLOBAL_LIST_EMPTY(cached_storage_typecaches)
 	else
 		thing.moveToNullspace()
 
-	if(animated)
-		animate_parent()
+	if(visual_updates)
+		if(animated)
+			animate_parent()
 
-	refresh_views()
-	parent.update_appearance()
+		refresh_views()
+		parent.update_appearance()
 
 	SEND_SIGNAL(parent, COMSIG_ATOM_REMOVED_ITEM, thing, remove_to_loc, silent)
 	SEND_SIGNAL(src, COMSIG_STORAGE_REMOVED_ITEM, thing, remove_to_loc, silent)
@@ -587,10 +589,11 @@ GLOBAL_LIST_EMPTY(cached_storage_typecaches)
  *
  * Arguments
  * * atom/drop_loc - where we're placing the item
+ * * update_storage - should we update the parent to show visual effects
  */
-/datum/storage/proc/remove_all(atom/drop_loc = parent.drop_location())
+/datum/storage/proc/remove_all(atom/drop_loc = parent.drop_location(), update_storage = TRUE)
 	for(var/obj/item/thing in real_location)
-		if(!attempt_remove(thing, drop_loc, silent = TRUE))
+		if(!attempt_remove(thing, drop_loc, silent = TRUE, visual_updates = update_storage))
 			continue
 		thing.pixel_x = thing.base_pixel_x + rand(-8, 8)
 		thing.pixel_y = thing.base_pixel_y + rand(-8, 8)