fix dual stream bug

[yizhang2077]

Motivation

ref #10344, it is caused by FuseMoE will inplace update hidden_states, which will interfere with the calculation of share expert

python3 -m sglang.launch_server --model Qwen/Qwen2-57B-A14B-Instruct  --tp 2

Accuracy: 0.869
Invalid: 0.002
Latency: 77.286 s
Output throughput: 1813.165 token/s

Modifications

Accuracy Tests

Benchmarking and Profiling

Checklist

• Format your code according to the Format code with pre-commit.
• Add unit tests according to the Run and add unit tests.
• Update documentation according to Write documentations.
• Provide accuracy and speed benchmark results according to Test the accuracy and Benchmark the speed.

[gemini-code-assist]

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[ispobock]

cc: @Alcanderian May have related issue in #7327