Refactor stations to properly use entity prototypes. (stationsv3) (#16570)

* Update StationSpawningSystem.cs

Web-edit to allow feeding in an existing entity.

* Update StationSpawningSystem.cs

value type moment

* Update StationSpawningSystem.cs

* Oh goddamnit this is a refactor now.

* awawawa

* aaaaaaaaaaa

* ee

* forgot records.

* no records? no records.

* What's in a name?

* Sloth forcing me to do the refactor properly smh.

* e

* optional evac in test.

* tests pls work

* awa

---------

Co-authored-by: moonheart08 <moonheart08@users.noreply.github.com>

Content.Server/Station/Components/StationDataComponent.cs

@@ -1,5 +1,7 @@
 using Content.Server.Shuttles.Systems;
 using Content.Server.Station.Systems;
+using Robust.Shared.Serialization.TypeSerializers.Implementations;
+using Robust.Shared.Utility;
 
 namespace Content.Server.Station.Components;
 
@@ -19,15 +21,6 @@ public sealed class StationDataComponent : Component
     /// <summary>
     /// List of all grids this station is part of.
     /// </summary>
-    /// <remarks>
-    /// You should not mutate this yourself, go through StationSystem so the appropriate events get fired.
-    /// </remarks>
     [DataField("grids")]
     public readonly HashSet<EntityUid> Grids = new();
-
-    /// <summary>
-    /// The emergency shuttle assigned to this station.
-    /// </summary>
-    [ViewVariables, Access(typeof(ShuttleSystem), typeof(EmergencyShuttleSystem), Friend = AccessPermissions.ReadWrite)]
-    public EntityUid? EmergencyShuttle;
 }