[no gbp] Lazy Templates can be configured to Place on Top, deathmatch…

… does this now (tgstation#81783)

## About The Pull Request

this is very much a code thing im not sure what i would say this just
adds an extra variable
also should be no sideeffects this is handled by turf reservations

also virtual domains (fixes  tgstation#81779)

## Why It's Good For The Game
![2024-03-02
11_28_18-Window](https://github.com/tgstation/tgstation/assets/70376633/85d094d3-c877-418f-bec9-af2f16736352)
this would formerly breach to space
## Changelog
:cl:
fix: fixes deathmatch baseturfs (you cant crowbar the floor to breach to
space)
/:cl:

code/datums/lazy_template.dm

@@ -13,6 +13,8 @@
 	var/map_dir = "_maps/templates/lazy_templates"
 	/// The filename (without extension) of the map to load
 	var/map_name
+	/// place_on_top: Whether to use /turf/proc/PlaceOnTop rather than /turf/proc/ChangeTurf
+	var/place_on_top = FALSE
 
 /datum/lazy_template/New()
 	reservations = list()
@@ -83,6 +85,7 @@
 			bottom_left.z,
 			z_upper = z_idx,
 			z_lower = z_idx,
+			place_on_top = place_on_top,
 		)
 		for(var/turf/turf as anything in block(bottom_left, top_right))
 			loaded_turfs += turf

code/modules/bitrunning/virtual_domain/virtual_domain.dm

@@ -6,6 +6,7 @@
 	map_dir = "_maps/virtual_domains"
 	map_name = "None"
 	key = "Virtual Domain"
+	place_on_top = TRUE
 
 	/// Cost of this map to load
 	var/cost = BITRUNNER_COST_NONE

code/modules/deathmatch/deathmatch_maps.dm

@@ -1,6 +1,8 @@
 /datum/lazy_template/deathmatch //deathmatch maps that have any possibility of the walls being destroyed should use indestructible walls, because baseturf moment
-	var/name
 	map_dir = "_maps/map_files/Deathmatch"
+	place_on_top = TRUE
+	/// Map UI Name
+	var/name
 	/// Map Description
 	var/desc = ""
 	var/min_players = 2