optimize gated gru cuda kernel (#15525)
### Description
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Improvement with Tulrv6 on A100
### Motivation and Context
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- If it fixes an open issue, please link to the issue here. -->
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Co-authored-by: Ubuntu <wy@v100-2.0cdb2e52twzevn1i4fi45bylyg.jx.internal.cloudapp.net>
