Obsolete Logger cleanup for EntitySystems (#25941)

* Small obsolete Logger cleanup

* Fixed three EntitySystem logs that weren't doing it right.

Content.Server/Humanoid/Systems/HumanoidAppearanceSystem.cs

@@ -186,7 +186,7 @@ public sealed partial class HumanoidAppearanceSystem : SharedHumanoidAppearanceS
 
         if (speciesPrototype == null)
         {
-            Logger.Error("Tried to get age representation of species that couldn't be indexed: " + species);
+            Log.Error("Tried to get age representation of species that couldn't be indexed: " + species);
             return Loc.GetString("identity-age-young");
         }