[cherry-pick] temporarily fix the performance drop of recurrent op #36053
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CreateStepScopes前面加锁 CreateStepScopes内部加锁 去掉锁 可以看到将锁移到CreateStepScopes内部能大幅提升网络性能，不过还需要确认能否直接去掉锁。 |
这个是否是在多线程情况下，比单线程的效率有一倍的下降？？ |
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多线程效率下降是正常的，不一定都是因为这个锁的原因 |
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PR types
Bug fixes
PR changes
OPs
Describe
修改recurrent算子内部线程锁的位置，以提高该算子性能。