BartEnocder add set_input_embeddings (#13960)
BartEnocder add set_input_embeddings (#13960)

* BartEnocder add set_input_embeddings

To unify the interface, add set_input_embeddings to BartEncoder.

* BartEnocder add get_input_embeddings
huggingface/transformers,huggingface/transformers,huggingface/transformers,huggingface/transformers