Tests reflect status quo. They establish baseline for later policy
changes. Some test cases are obvious bugs (e.g. mass rebuild checks are
skipped on staging-nixos), others may also be questionable.
Assisted-by: Codex gpt-5.6-sol medium
(cherry picked from commit e1aa8c4d16)
Since all github-scripts need to be written in commonjs, we now default
to it by not setting package.json. Support from editors for .js files is
slightly better than .cjs. To still allow using module imports in the
test runner script, we trick node into loading the script itself as a
module again via `--import ./run`.
This just moves things around to use less specific naming - `labels` is
only *one* script that can potentially be run locally while still being
written in github-script. Later, we can add more.
