[Simulator] Add high-fidelity CPU-based inference simulator (#33824)

Co-authored-by: zhouhaizhu.zhz <zhouhaizhu.zhz@alibaba-inc.com>
Co-authored-by: LinSiyuan814 <linsiyuan.lsy@alibaba-inc.com>
Co-authored-by: hzh0425 <hzh0425@apache.org>

tools/sglang-simulator/test/assets/qwen3-8b/config.json

@@ -0,0 +1,28 @@
+{
+  "architectures": ["Qwen3ForCausalLM"],
+  "attention_bias": false,
+  "attention_dropout": 0.0,
+  "bos_token_id": 151643,
+  "eos_token_id": 151645,
+  "head_dim": 128,
+  "hidden_act": "silu",
+  "hidden_size": 4096,
+  "initializer_range": 0.02,
+  "intermediate_size": 12288,
+  "max_position_embeddings": 40960,
+  "max_window_layers": 36,
+  "model_type": "qwen3",
+  "num_attention_heads": 32,
+  "num_hidden_layers": 36,
+  "num_key_value_heads": 8,
+  "rms_norm_eps": 1e-06,
+  "rope_scaling": null,
+  "rope_theta": 1000000,
+  "sliding_window": null,
+  "tie_word_embeddings": false,
+  "torch_dtype": "bfloat16",
+  "transformers_version": "5.12.1",
+  "use_cache": true,
+  "use_sliding_window": false,
+  "vocab_size": 151936
+}