Revert "[release 2.11] Update to torch 2.11" (#34644)

[vllm-agent]

Revert of #34644

This reverts the merge commit 2111997 from PR #34644.

Reason

5 new CI test failures detected in nightly build #60295:

• MoE Refactor Integration Test (B200 - TEMPORARY) — Server failed to start in time for Llama-4-Scout-BF16-fi-cutlass
• Language Models Test (Extended Generation) — Logprobs divergence for bigcode/starcoder2-3b
• Language Models Test (Extended Pooling) — test_set_max_model_len_illegal did not raise expected ValueError
• Language Models Test (MTEB) — Nomic embedding accuracy assertion failure
• Quantization — Server failed to start in time for cpu_offload_compressed_tensors

Changes reverted

This PR updated torch from 2.10 to 2.11, torchao from 0.14.1 to 0.17.0, CUDA from 12.9 to 13.0, and modified moe_runner_base.py, quantization CI config, and test dependencies. The revert rolls back all of these changes.

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Auto-generated by CI failure analyzer | Build #60295

[mergify]

Documentation preview: https://vllm--39300.org.readthedocs.build/en/39300/

[gemini-code-assist]

Code Review

This pull request downgrades the supported versions of PyTorch (from 2.11.0 to 2.10.0), CUDA (from 13.0.0 to 12.9.1), and associated dependencies such as torchvision, torchaudio, and torchao across the build system, Dockerfiles, and CI configurations. Key changes include unskipping tests previously incompatible with PyTorch 2.11 and simplifying the MoE layer name resolution. Review feedback identifies a critical shell syntax error in the Dockerfile caused by comments within a multi-line command and an inconsistency in RISC-V platform support within the CPU build requirements.

[gemini-code-assist]

The inclusion of comments within the multi-line apt-get install command breaks the shell execution. The backslash on line 556 causes the shell to continue the command to line 557, which is a comment. This effectively terminates the apt-get install command arguments, and line 559 will be interpreted as a new (and invalid) command, causing the build to fail. Please move these comments outside of the command or place them after the && operator on a separate line.

        libcublas-${CUDA_VERSION_DASH} \ 
        libnccl-dev && \

[gemini-code-assist]

The riscv64 platform is missing from the torch requirements in cpu-build.txt, creating an inconsistency with requirements/cpu.txt where it is present. This will cause build failures on RISC-V systems as the torch dependency will not be satisfied during the build phase.

torch==2.10.0+cpu; platform_machine == "x86_64" or platform_machine == "s390x"
torch==2.10.0; platform_machine == "aarch64" or platform_system == "Darwin" or platform_machine == "ppc64le" or platform_machine == "riscv64"