(Coincidentally), this wasn't an issue before fdfeaaf1f, because
pre-verification was run after `test.sh`, during which `aio-builds-setup` was
built.
Now that `deploy-staging.sh` is being run before `test.sh`, we need to build
the `aio-builds-setup` scripts first.
Generate the docs with `yarn docs`.
Test the doc generation code with `yarn docs-test`
The docs are automatically built as part of the `yarn build` task,
so there is no need to rebuild them in the test_aio.sh file