Support stream priority for standalone executor #49939
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pangengzheng
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Feb 2, 2023
* Support stream priority for standalone executor * Fix compile error * Fix compile error * Fix compile error * Fix compile error * Fix compile error
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在#47411 支持自定义OP执行流基础上，本PR支持在dist_attr中为自定义流指定优先级。
由于流优先级是在底层调用CUDA API创建流时进行指定，在流创建之后不可更改，因此一个流只能对应一个优先级。这个约束由上层进行保证，若出现多个指定了相同流的OP设置了不同的优先级，则该流的优先级会与Program中第一个OP的设定相同。