[AMD] [AGENTX] dsv4-fp4-mi355x-sglang-mtp: gate simulated acceptance to throughput runs

Only export SGLANG_SIMULATE_ACC_* when EVAL_ONLY=false. Simulated acceptance
bypasses real target verification, so it must be off for accuracy (EVAL_ONLY)
runs or it corrupts the eval score.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: seungrokj

benchmarks/single_node/agentic/dsv4_fp4_mi355x_sglang_mtp.sh

@@ -118,9 +118,12 @@ CUDA_GRAPH_MAX_BS=$CONC
 # openai.BadRequestError: Error code: 400 - {'object': 'error', 'message': "The   input (3620936 tokens) is longer than the model's context length (1048576       tokens).", 'type': 'BadRequestError', 'param': None, 'code': 400} 
 export SGLANG_DEFAULT_THINKING=1
 export SGLANG_DSV4_REASONING_EFFORT=high
-export SGLANG_SIMULATE_ACC_LEN=2.49
-export SGLANG_SIMULATE_ACC_METHOD=match-expected
-export SGLANG_SIMULATE_ACC_TOKEN_MODE=real-draft-token
+
+if [ "${EVAL_ONLY:-false}" = "false" ]; then
+    export SGLANG_SIMULATE_ACC_LEN=2.49
+    export SGLANG_SIMULATE_ACC_METHOD=match-expected
+    export SGLANG_SIMULATE_ACC_TOKEN_MODE=real-draft-token
+fi
 
 export SGLANG_USE_ROCM700A=0
 export SGLANG_HACK_FLASHMLA_BACKEND=unified_kv_triton