Reuse stories llama setup script

Author: winskuo-quic

.ci/scripts/setup-stories-llama.sh

@@ -460,7 +460,8 @@ jobs:
         PYTHON_EXECUTABLE=python bash .ci/scripts/build-qnn-sdk.sh
 
         # Retrieve 110M Stories Llama Artifacts
-        PYTHON_EXECUTABLE=python bash .ci/scripts/setup-stories-llama.sh
+        PYTHON_EXECUTABLE=python bash .ci/scripts/utils.sh
+        PYTHON_EXECUTABLE=python download_stories_model_artifacts
         
         # Test static llama stories110m
         PYTHON_EXECUTABLE=python backends/qualcomm/tests/test_qnn_delegate.py -k TestExampleScript.test_stories_single_llama --model SM8650 --build_folder build-android/ --executorch_root . --artifact_dir . --compile_only"