gha: use docker-based workflow for now
gha: use docker-based workflow for now

Network connections failed when running on the host, so for now
just going back to running the tests in a container;

    Timeout connecting to http://localhost:32456/Plugin.Activate

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

docker/go-plugins-helpers