Change name of trainArrivalDelaySeconds to clarify its meaning (!171)

Changed the name of the new `trainArrivalDelaySeconds` setting to `trainArrivalDelayObservedSeconds` so it's more obvious that it doesn't actually control the train arrival time.

`trainArrivalDelayObservedSeconds` is my first choice for naming this setting, and `trainArrivalDelayThatYouDefinitelyShouldNotChangeSoDoNotEvenThinkAboutItSeconds` is my second choice.

Co-authored-by: dwesterwick <dwesterwick@yahoo.com>
Reviewed-on: https://dev.sp-tarkov.com/SPT-AKI/Server/pulls/171
Co-authored-by: DanW <danw@noreply.dev.sp-tarkov.com>
Co-committed-by: DanW <danw@noreply.dev.sp-tarkov.com>

project/assets/configs/location.json

@@ -842,7 +842,7 @@
     "looseLootBlacklist": {},
     "scavRaidTimeSettings": {
         "settings": {
-            "trainArrivalDelaySeconds": 90
+            "trainArrivalDelayObservedSeconds": 90
         },
         "maps": {
             "bigmap": {

project/src/models/spt/config/ILocationConfig.ts

@@ -115,7 +115,7 @@ export interface IScavRaidTimeSettings
 
 export interface IScavRaidTimeConfigSettings
 {
-    trainArrivalDelaySeconds: number
+    trainArrivalDelayObservedSeconds: number
 }
 
 export interface IScavRaidTimeLocationSettings

project/src/services/RaidTimeAdjustmentService.ts

@@ -226,7 +226,7 @@ export class RaidTimeAdjustmentService
                 //
                 // I added 2 seconds just to be safe...
                 //
-                const trainArrivalDelaySeconds = this.locationConfig.scavRaidTimeSettings.settings.trainArrivalDelaySeconds;
+                const trainArrivalDelaySeconds = this.locationConfig.scavRaidTimeSettings.settings.trainArrivalDelayObservedSeconds;
     
                 // Determine the earliest possible time in the raid when the train would leave
                 const earliestPossibleDepartureMinutes = (exit.MinTime + exit.Count + exit.ExfiltrationTime + trainArrivalDelaySeconds) / 60;