支持brpc 测试场景

当前的测试案例跟实际差距有点大。 建议增加brpc 的测试场景：https://github.com/apache/brpc/blob/master/docs/cn/benchmark.md

Start by reading the linked brpc benchmark documentation and inspecting the repository's existing test cases to understand how scenarios are represented. Add a brpc test scenario that reflects the referenced benchmark use case, then verify that it runs alongside the current tests and produces comparable benchmark results.

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