Creates metadata for an enumerable interface type backed by List<T> using source-generated resolution for nested elements.
protected static TomlTypeInfo<TEnumerable> CreateSourceGeneratedListBackedEnumerableTypeInfo<TEnumerable, TElement>(TomlSerializerContext context)
where TEnumerable : IEnumerable<TElement>
This method avoids reflection-based metadata resolution, making it compatible with trimming and NativeAOT.