Running the tests inside fedora means we get much more meaningful
results as we will have all the required packaes and there will
be no need to skip tests.
This commit adds the missing `merge_group` to the pytest and go
test workflows.
Note that I added `types: [ "checks_requested" ]` (just like we
have for the container.yaml) but I'm not actually sure about it,
the GH docs are a bit unclear to me here, it seems they suggest
to keep this generic but then the example explicitly uses `type`
(I'm probably overthinking this fwiw).
[1] https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#merge_group
The original `go.yml` got added via some GH automation. But we
are not MSDOS and we can affort more than 3 chars for a file
extension - so this commit renames all .yml to .yaml which is
what we use everywhere else.
