Fix plant mutations carrying over to other plants and future rounds (#32257)

Lists are a reference type, so each component should get a new one, not point at the previous one.

Co-authored-by: PraxisMapper <praxismapper@gmail.com>

Content.Server/Botany/SeedPrototype.cs

@@ -291,12 +291,13 @@ public partial class SeedData
             CanScream = CanScream,
             TurnIntoKudzu = TurnIntoKudzu,
             SplatPrototype = SplatPrototype,
-            Mutations = Mutations,
+            Mutations = new List<RandomPlantMutation>(),
 
             // Newly cloned seed is unique. No need to unnecessarily clone if repeatedly modified.
             Unique = true,
         };
 
+        newSeed.Mutations.AddRange(Mutations);
         return newSeed;
     }