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* support adam bf16 state
Signed-off-by: XiaobingSuper <xiaobingzhangupc@gmail.com>

* use fp32 kernel but keep bf16 optimizer states to save memory
Signed-off-by: lit <lit@nvidia.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci



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Signed-off-by: XiaobingSuper <xiaobingzhangupc@gmail.com>
Signed-off-by: lit <lit@nvidia.com>
Co-authored-by: XiaobingSuper <xiaobingzhangupc@gmail.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>