Describe the bug

gh run cancel doesn't validate the run_id passed in, which can result in some weird error messages.

$ gh --version
gh version 2.30.0 (2023-05-30)
https://github.com/cli/cli/releases/tag/v2.30.0

Steps to reproduce the behavior

Pass in a multiline string as the run_id to gh run cancel, e.g.

$ gh run cancel -R barrettj12/juju '5000
> 5000'
parse "https://api.github.com/repos/barrettj12/juju/actions/runs/5000\n5000?exclude_pull_requests=true": net/url: invalid control character in URL

Expected vs actual behavior

Return a reasonable error such as invalid run_id "5000\n5000".