message: Fix replicate type in tpu_cluster_formation.
  ReplicatedInput might not have the exact shape as its operands (e.g., missing handle shape)
diff: @@ -331,7 +331,7 @@ LogicalResult ReplicateCluster(tf_device::LaunchOp launch_op,
  return input->emitOpError() << "requires " << num_replicas << " operands";
  replicated_inputs.push_back(
  - {input->getOperands(), *input->result_type_begin()});
  + {input->getOperands(), input->getOperand(0).getType()});
  if (llvm::cast<TF::TPUReplicatedInputOp>(input).is_mirrored_variable())
  mirrored_variable_indices.push_back(pos_and_input.index());
  }
  