Update Dockerfile and install runai-model-streamer[gcs] package (#26464)

Signed-off-by: Peter Schuurman <psch@google.com>

Author: pwschuurman

docker/Dockerfile

@@ -542,7 +542,7 @@ RUN --mount=type=cache,target=/root/.cache/uv \
     else \
         BITSANDBYTES_VERSION="0.46.1"; \
     fi; \
-    uv pip install --system accelerate hf_transfer modelscope "bitsandbytes>=${BITSANDBYTES_VERSION}" 'timm>=1.0.17' 'runai-model-streamer[s3]>=0.14.0'
+    uv pip install --system accelerate hf_transfer modelscope "bitsandbytes>=${BITSANDBYTES_VERSION}" 'timm>=1.0.17' 'runai-model-streamer[s3,gcs]>=0.14.0'
 
 ENV VLLM_USAGE_SOURCE production-docker-image