New Github Action to run e2e tests #161

The e2e tests are in the fl-testing repository. We need a new action that pulls that repo and runs the e2e tests.

This might require some new additions to fl-testing to make it easier to be used from an action, but in general we should only need to have:

• Go installation step
• checkout of funless
• checkout of fl-testing
• run the tests with go

The ubuntu image form github (runs-on: ubuntu-latest) should already contain docker which is used by the cli to setup the dev deployment for the tests.