[example] update opt example using booster api (#3918)

examples/language/opt/run_benchmark.sh

@@ -0,0 +1,30 @@
+set -xe
+pip install -r requirements.txt
+
+export BS=32
+export MEMCAP=0
+export GPUNUM=1
+
+# acceptable values include `125m`, `350m`, `1.3b`, `2.7b`, `6.7b`, `13b`, `30b`, `66b`
+export MODEL="125m"
+
+for BS in 8 32 128
+do
+for PLUGIN in "torch_ddp" "torch_ddp_fp16" "low_level_zero" "gemini"
+do
+for GPUNUM in 1 4
+do
+
+MODLE_PATH="facebook/opt-${MODEL}"
+torchrun \
+  --standalone \
+  --nproc_per_node ${GPUNUM} \
+  opt_benchmark.py \
+  --model_name_or_path ${MODLE_PATH} \
+  --mem_cap ${MEMCAP} \
+  --plugin ${PLUGIN} \
+  --batch_size ${BS}
+  
+done
+done
+done