* [Enhance] Enhance revert_sync_batchnorm and convert_sync_batchnorm

* [Enhance] Enhance revert_sync_batchnorm and convert_sync_batchnorm

* Fix unit test

* Add coments

* Refine comments

* clean the code

* revert convert_sync_batchnorm

* revert convert_sync_batchnorm

* refine comment

* fix CI

* fix CI