Fix bug: Don't check dims if contain_unknown_dim of cross_entropy_grad_op in compile time  (#25221)
Fix bug: Don't check dims if contain_unknown_dim of cross_entropy_grad_op in compile time  (#25221)


luotao1/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,luotao1/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,luotao1/Paddle