ossf security best practice: The project MUST have evidence that the [test_policy](https://www.bestpractices.dev/en/projects/11652/passing/edit#test_policy) for adding tests has been adhered to in the most recent major changes to the software produced by the project

[illume]

• Add CI check to see if tests are included
  • headlamp frontend
  • headlamp backend
  • plugins

Check the test coverage does not go down VS main branch.
Note: see backend / frontend old CI jobs in headlamp repo for inspo.
Note: commenting does not work because of security restrictions blocking a forks CI runs from posting comments