message: [tf.data] Minor performance improvement in the `Dataset.range()` implementation.
  Avoids invoking the `Tensor` constructor twice per `GetNextInternal()` invocation.
diff: @@ -104,9 +104,9 @@ class RangeDatasetOp : public DatasetOpKernel {
  *end_of_sequence = true;
  return Status::OK();
  }
  - Tensor value_tensor(ctx->allocator({}), DT_INT64, {});
  - value_tensor.scalar<int64>()() = next_;
  - out_tensors->emplace_back(std::move(value_tensor));
  + out_tensors->emplace_back(ctx->allocator({}), DT_INT64,
  + TensorShape({}));
  + out_tensors->back().scalar<int64>()() = next_;
  *end_of_sequence = false;
  next_ += dataset()->step_;
  