Fixed the problem that the training cannot be resumed when there is no metric file in the checkpoint.

* Update GPT2 Text Generation Module

* add food classification module

Co-authored-by: Nhaoyuying <35907364+haoyuying@users.noreply.github.com>

* Added spinalnet gemstone classification module

* Add marine_biometrics

* Digital dial segmentation of Watermeter

* update Transformer module that can do text-matching task

* Add dataset, module task, and demo of text-matching

* do finetune text cls & ner via using embedding module

* 微博谣言预测

* 请教条

* Update module.py

* Update module.py

* Update module.py

* Update README.md

* Update README.md

* Add embedding seq-cls finetune demo and update api

* Update docs of pad_sequence and trunc_sequence