Restores Per-Map Shuttles (#4736)

## About The Pull Request
Title.
## Why It's Good For The Game
<img width="981" height="881" alt="image"
src="https://github.com/user-attachments/assets/c98b3fe8-a5f3-43bb-9cbf-c53e38141e0d"
/>

<img width="535" height="777" alt="image"
src="https://github.com/user-attachments/assets/107b0004-f878-4c9f-9f7f-0658bd067195"
/>


TG maps typically have per-map shuttles which is very cool. Meaning that
even if buying a shuttle slips the mind, you'd still have one different
from the previous map.



## Proof Of Testing
<details>
<summary>Screenshots/Videos</summary>

</details>

## Changelog
🆑
del: Per-Map shuttles are back.
/🆑

_maps/boxstation.json

@@ -6,7 +6,7 @@
 	"shuttles": {
 		"emergency": "emergency_box",
 		"ferry": "ferry_fancy",
-		"cargo": "cargo_skyrat",
+		"cargo": "cargo_box",
 		"whiteship": "whiteship_box"
 	},
 	"job_changes": {

_maps/deltastation.json

@@ -6,7 +6,7 @@
 	"shuttles": {
 		"emergency": "emergency_delta",
 		"ferry": "ferry_fancy",
-		"cargo": "cargo_delta_skyrat",
+		"cargo": "cargo_delta",
 		"whiteship": "whiteship_delta"
 	},
 	"job_changes": {

_maps/icebox.json

@@ -9,7 +9,7 @@
 	"planetary": 1,
 	"give_players_hooks": 1,
 	"shuttles": {
-		"cargo": "cargo_skyrat",
+		"cargo": "cargo_box",
 		"ferry": "ferry_fancy",
 		"whiteship": "whiteship_box",
 		"emergency": "emergency_box"

_maps/metastation.json

@@ -4,7 +4,7 @@
 	"map_path": "map_files/MetaStation",
 	"map_file": "MetaStation.dmm",
 	"shuttles": {
-		"cargo": "cargo_skyrat",
+		"cargo": "cargo_box",
 		"ferry": "ferry_fancy",
 		"whiteship": "whiteship_meta",
 		"emergency": "emergency_meta"

_maps/moonstation.json

@@ -51,6 +51,5 @@
 		"Captain": {
 			"special_charter": "moon"
 		}
-	},
-	"emergency_override": 1
+	}
 }

_maps/tramstation.json

@@ -5,7 +5,7 @@
 	"map_file": "tramstation.dmm",
 	"give_players_hooks": 1,
 	"shuttles": {
-		"cargo": "cargo_skyrat",
+		"cargo": "cargo_box",
 		"ferry": "ferry_fancy",
 		"whiteship": "whiteship_tram",
 		"emergency": "emergency_tram"

code/datums/map_config.dm

@@ -44,10 +44,10 @@
 
 	var/allow_custom_shuttles = TRUE
 	var/shuttles = list(
-		"cargo" = "cargo_skyrat",
+		"cargo" = "cargo_box",
 		"ferry" = "ferry_fancy",
 		"whiteship" = "whiteship_meta",
-		"emergency" = "emergency_skyrat", //SKYRAT EDIT CHANGE
+		"emergency" = "emergency_meta",
 	)
 
 	/// Dictionary of job sub-typepath to template changes dictionary
@@ -169,11 +169,6 @@
 		log_world("map_config shuttles is not a list!")
 		return
 
-	//BUBBERSTATION CHANGE: FIXES DUMB SKYRAT OVERRIDE. HOLY SHIT. THIS WASN'T EVEN MARKED AS MODULAR.
-	if(!json["emergency_override"])
-		shuttles["emergency"] = "emergency_skyrat"
-	//BUBBERSTATION CHANGE END
-
 	traits = json["traits"]
 	// "traits": [{"Linkage": "Cross"}, {"Space Ruins": true}]
 	if (islist(traits))