[feat]Adapt Jinyi prefill GDN module

[IzacharyI]

Motivation

Integrate Qwen3.5 related SGLang changes.

Modifications

Accuracy Tests

397 tp8 isl 8000 osl 500 BS1

qwen3.5 27b ptpc tp2

Benchmarking and Profiling

enable vk layout GDN module in prefill phase

export SGLANG_GDN_PREFILL_OPT_VK=1   # opt-vk prefill;
export GATED_DELTA_RULE_TRITON_AUTOTUNE=1 # tune for delta out

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.
• Follow the SGLang code style guidance.

Review Process

1. Ping Merge Oncalls to start the PR flow. See the PR Merge Process.
2. Get approvals from CODEOWNERS and other reviewers.
3. Trigger CI tests with comments or contact authorized users to do so.
   • /tag-run-ci-label, /rerun-failed-ci, /tag-and-rerun-ci
4. After green CI and required approvals, ask Merge Oncalls to merge.