fix lac bug (#5190)

* add pure fp16 training.

* Add lookup_table in custom_black_list during the pure fp16 training.

* add transformer for rc0

* predict no_grad

* add benchmark readme

* add predict for static

* update doc for fleet api

* typo

* add dygraph amp support for transformer

* according params use_amp to decide use dygraph amp

* add fleet, test=develop

* update codes for senta benchmark

* support pad seq and bsz multi

* alter vocab size

* alter md5sum

* root for reader

nlp bert benchmark add gradient merge

* add static predict

* rm position_encoding_init

* fix static predict

* add the xpu support the the paddlenlp

* add the support xpu for the ernie and bert
Co-authored-by: Nwawltor <fanzeyang0904@hotmail.com>

change the format for the bert benchmark (#5160)

* fix incorrect usage of data loader

* refine code

* remove unused code

* refine code

add the suport the log format for the benchmark

* upgrade MapDatasetWrapper

* minor fix

* refine code

* new chunk_eval

* np first

* add embedding example in embeddings.md

* add embedding.md link in toke_embedding readme

* fix windows url bug

* add pad factor to pad vocab

* shuffle batch

* update reader

* update benchmark

* fix hung

* add shuffle batch

* update

* reader_seed to shuffle_seed

* seed for shuffle batch

* add more English embedding name

* fix doc bug

* delete useless description

* add comments of TokenEmbedding

* add embedding model info

fix for pgl for the erniesage

* update __init__

* solve conflicts

* update couplet readme

* add transformer-xl for language model

* fix readme and change cross-entropy api

* change api back

fix erniesage for pgl 2.0 alpha 

* update __init__

* fix readme version info