🤦‍♂️ #3717 didn't quite do what I intended. It failed to upload an artifact if coverage was not met -- https://github.com/fastify/fastify/runs/5267302531?check_suite_focus=true

This PR tweaks the coverage:ci script to not check the coverage and adds a new script that explicitly checks the coverage. This gives us 1. the uploading of the desired artifact and 2. prevention of running further workflows when coverage is not met.

This run shows that the the workflows are doing as outlined above -- https://github.com/fastify/fastify/actions/runs/1873437127

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct