feat: [Qwen3.5] Support block-wise FP8 quantization and model adaptation#18926

ispobock merged 5 commits intosgl-project:mainsgl-project/sglang:mainfrom

zju-stu-lizheng:qwen3_5/fp8_fixzju-stu-lizheng/sglang-qwen3_5:qwen3_5/fp8_fixCopy head branch name to clipboard