add runai model streamer e2e test for GCS

Author: amacaskill

tests/model_executor/model_loader/runai_model_streamer/test_runai_model_streamer_loader.py

@@ -7,6 +7,7 @@
 
 load_format = "runai_streamer"
 test_model = "openai-community/gpt2"
+test_gcs_model = "gs://vertex-model-garden-public-us/codegemma/codegemma-2b/"
 
 prompts = [
     "Hello, my name is",
@@ -32,3 +33,8 @@ def test_runai_model_loader_download_files(vllm_runner):
     with vllm_runner(test_model, load_format=load_format) as llm:
         deserialized_outputs = llm.generate(prompts, sampling_params)
         assert deserialized_outputs
+
+def test_runai_model_loader_download_files_gcs(vllm_runner):
+    with vllm_runner(test_gcs_model, load_format=load_format) as llm:
+        deserialized_outputs = llm.generate(prompts, sampling_params)
+        assert deserialized_outputs