[Build] Supports CUDA 12.6 and 11.8 after Blackwell Update

[simon-mo]

#18095 broke CUDA 12.6 and 11.8 wheel build

[github-actions]

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[simon-mo]

Test build here https://buildkite.com/vllm/release/builds/5164/steps

[simon-mo]

11.8 failing fixes from #17679

This PR fixed 12.6 build.