For vllm + gpt-oss-20b + combo kernel, we can see ~50 prints of `ComboKernels: 1 large pointwise nodes are separated`. We should check if this misses some optimization opportunities, or consider not spam the user output.

Repro and log: [P1991444071](https://www.internalfb.com/phabricator/paste/view/P1991444071)

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