[feat] Add support for Qwen3.5 and Qwen3-Next to ATOM-plugined SGLang#532

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wanzhenchn wants to merge 8 commits intoROCm:mainfrom

wanzhenchn:feat/qwen3.5-sgl-plugin-final

Commits on Apr 17, 2026

[feat] ATOM support SGLang out-of-tree for Qwen3-Next

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[feat] ATOM support SGLang out-of-tree for Qwen3.5 MoE & Dense models

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[plugin][sglang] fix Qwen3.5 FP8-Blockwise weight load and shuffle_weight shape check failed

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[plugin][sglang] fix Qwen3.5 FP8-PTPC shuffle_weight check error

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[plugin][sglang] keep AiterAttnBackend for Qwen3.5 models instead of ATOMAttnBackendForSgl

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[plugin][sglang] code refactoring for qwen3.5 & qwen3-next models; add UT

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[Fix] fix code style
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[plugin] code refactor for qwen3.5 & qwen3-next
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