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/AlertLevel/AlertLevelComponent.cs

@@ -1,3 +1,5 @@
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
 namespace Content.Server.AlertLevel;
 
 /// <summary>
@@ -14,7 +16,7 @@ public sealed class AlertLevelComponent : Component
     public AlertLevelPrototype? AlertLevels;
 
     // Once stations are a prototype, this should be used.
-    [DataField("alertLevelPrototype")]
+    [DataField("alertLevelPrototype", required: true, customTypeSerializer: typeof(PrototypeIdSerializer<AlertLevelPrototype>))]
     public string AlertLevelPrototype = default!;
 
     /// <summary>