Revert "[CPU]Update CPU PyTorch to 2.9.0 (#29589)" (#29647)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

docker/Dockerfile.cpu

@@ -119,6 +119,7 @@ FROM base AS vllm-test-deps
 
 WORKDIR /workspace/vllm
 
+# TODO: Update to 2.9.0 when there is a new build for intel_extension_for_pytorch for that version
 RUN --mount=type=bind,src=requirements/test.in,target=requirements/test.in \
     cp requirements/test.in requirements/cpu-test.in && \
     sed -i '/mamba_ssm/d' requirements/cpu-test.in && \
@@ -131,6 +132,9 @@ RUN --mount=type=bind,src=requirements/test.in,target=requirements/test.in \
       esac; \
     }; \
     remove_packages_not_supported_on_aarch64 && \
+    sed -i 's/^torch==.*/torch==2.8.0/g' requirements/cpu-test.in && \
+    sed -i 's/torchaudio.*/torchaudio/g' requirements/cpu-test.in && \
+    sed -i 's/torchvision.*/torchvision/g' requirements/cpu-test.in && \
     uv pip compile requirements/cpu-test.in -o requirements/cpu-test.txt --index-strategy unsafe-best-match --torch-backend cpu
 
 RUN --mount=type=cache,target=/root/.cache/uv \