* Cherry-pick the register of bfloat16 for amp_kernel, pull request #45541.

* Cherry-pick the master_grad support of adamw, pull request #51141.

* add bf16 for some ops in static mode (#51582)

* Add bfloat16 support for some api in static mode.

* Fix codestyle.

* Revert the change of layer_function_generator.py.

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Co-authored-by: Shaojie WANG <wsjmessi@163.com>