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

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

Content.Server/Entry/EntryPoint.cs

@@ -174,7 +174,6 @@ namespace Content.Server.Entry
         protected override void Dispose(bool disposing)
         {
             _playTimeTracking?.Shutdown();
-            _sysMan?.GetEntitySystemOrNull<StationSystem>()?.OnServerDispose();
             _dbManager?.Shutdown();
         }