add sync_batch_norm_bn and deliver indices_dict 

* cherry-pick #46359 and resolve conflict

* polish code comments

* polish data_device_transform.cc

* fix test and doc

* add sparse SyncBatchNorm

* use yapf to format all python file

* yapf exclude two unittests file for they rely on writing and reading file, and format will break them

* disable diff_py_file because too many diff files cause command following failed