fmf: Disable retrying affected tests
fmf: Disable retrying affected tests

Now that we run the tests for pull request, they were subject to the
"retry when affected" mechanism. But we don't have any parallelism
there, so tests take too long in that case.

The machines are also much slower than our cockpit CI ones and
apparently have noisy neighbors, so that they commonly run into random
timeouts; so let's rather do the normal "retry up to three times"
mechanism to guard against these. We do the stabilization in runs on our
own infra.

mvollmer/cockpit,cockpit-project/cockpit,martinpitt/cockpit,martinpitt/cockpit,cockpit-project/cockpit,mvollmer/cockpit,garrett/cockpit,cockpit-project/cockpit,martinpitt/cockpit,garrett/cockpit,garrett/cockpit,mvollmer/cockpit,martinpitt/cockpit,garrett/cockpit,mvollmer/cockpit,garrett/cockpit,martinpitt/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,mvollmer/cockpit