* API2.0 del old api(BilinearTensorProduct) from nn init.py, test=develop

* add import for deprecated, test=develop

* modify deprecated location, test=develop

* fix english doc, test=develop

* Update __init__.py

* Update __init__.py

* Update common.py

* fix english doc, test=develop
Co-authored-by: NChen Weihang <chenweihang@baidu.com>