support tool wait in benchmark

[BingooYang]

Motivation

benchmark增加tool工具时间等待（需要配合带tool时间数据集使用，对之前功能不影响），解决：

1. 静态多轮和RL真实场景调度 gap 比较大
2. 动态多轮（真实调用工具）测试不稳定

Modifications

读取多轮数据集中 tool 在 RL 场景真实的等待时长，在发请求时 wait，模拟真实场景

Usage or Command

默认开启，如果需要关闭，请使用 export DISABLE_ENV_TOOL_WAIT=off

Accuracy Tests

无

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
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• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
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