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75c7ad99 - [Kernel][Performance] Fuse float cast and renormalize to topk softmax kernel (#26717)

[Kernel][Performance] Fuse float cast and renormalize to topk softmax kernel (#26717) Signed-off-by: zhuhaoran <zhuhaoran.zhr@alibaba-inc.com> Signed-off-by: izhuhaoran <izhuhaoran@qq.com>