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aca7be83 - Set `COLUMNS` in Linux CI workflow to prevent regressions (#11589)

Set `COLUMNS` in Linux CI workflow to prevent regressions (#11589) ## Summary When tests are run downstream, the `COLUMNS` environment variable is used to force fixed output width and avoid test failures due to different terminal widths. However, this occasionally causes test regressions when other tests rely on different output width. Use the same `COLUMNS` value in CI to ensure consistent output and catch any regressions. ## Test Plan It wasn't, it's supposed to be tested by the CI :-). --------- Co-authored-by: Zanie Blue <contact@zanie.dev>