Use larger node for cpp-linters job in nightly tests (rapidsai#20963)

## Description
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<!-- Reference any issues closed by this PR with "closes rapidsai#1234". -->
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The nightly workflow has been silently failing on this job
([example](https://github.com/rapidsai/cudf/actions/runs/20651999970/job/59298298092)).
That most likely indicates an OOM, especially since the same job is
passing in PR CI and the only difference is that [PR CI is already using
a larger node for this
job](https://github.com/rapidsai/cudf/blob/77d3ca3653e530b1637f5a8470172c4c457cfb15/.github/workflows/pr.yaml#L155).
This PR makes the same change for nightlies to see if that fixes them.

## Checklist
- [x] I am familiar with the [Contributing
Guidelines](https://github.com/rapidsai/cudf/blob/HEAD/CONTRIBUTING.md).
- [x] New or existing tests cover these changes.
- [x] The documentation is up to date with these changes.

Author: vyasr

.github/workflows/test.yaml

@@ -62,6 +62,7 @@ jobs:
       sha: ${{ inputs.sha }}
       script: "ci/cpp_linters.sh"
       file_to_upload: iwyu_results.txt
+      node_type: cpu16
   conda-python-cudf-tests:
     secrets: inherit
     uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@main