[booster] update bert example, using booster api (#3885)

examples/language/bert/test_ci.sh

@@ -1,2 +1,8 @@
-set -x
-env GPUNUM=1 bash run_gemini.sh
+#!/bin/bash
+set -xe
+
+pip install -r requirements.txt
+
+for plugin in "torch_ddp" "torch_ddp_fp16" "gemini" "low_level_zero"; do
+   torchrun --standalone --nproc_per_node 4  finetune.py --target_f1 0.86 --plugin $plugin --model_type "bert"
+done