Fix TEG assert (#26881)

It's possible to trigger this by stacking it weirdly with the spawn panel. Just make it bail instead.

Content.Server/Power/Generation/Teg/TegNodeGroup.cs

@@ -66,11 +66,16 @@ public sealed class TegNodeGroup : BaseNodeGroup
 
     public override void LoadNodes(List<Node> groupNodes)
     {
-        DebugTools.Assert(groupNodes.Count <= 3, "The TEG has at most 3 parts");
         DebugTools.Assert(_entityManager != null);
 
         base.LoadNodes(groupNodes);
 
+        if (groupNodes.Count > 3)
+        {
+            // Somehow got more TEG parts. Probably shenanigans. Bail.
+            return;
+        }
+
         Generator = groupNodes.OfType<TegNodeGenerator>().SingleOrDefault();
         if (Generator != null)
         {