Disable magnet wrecks (#23664)

Until we can manage these code-wise better and not rely upon people who aren't even around anymore to balance them.

Content.Server/Salvage/Magnet/SalvageMagnetDataComponent.cs

@@ -44,7 +44,7 @@ public sealed partial class SalvageMagnetDataComponent : Component
     public List<int> Offered = new();
 
     [DataField]
-    public int OfferCount = 6;
+    public int OfferCount = 3;
 
     [DataField]
     public int ActiveSeed;