Revert "Set fail-fast to true in upstream zuul project"

[amartyasinha]

Reverts #3280

Some jobs are getting RETRY_LIMIT constantly. Let's revert fail-fast for now.

[openshift-ci]

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[danpawlik]

Sometimes we just want to see other CI job results. Zuul users can deque the CI job

[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/c450236d21354b58a299c281796480e5

✔️ openstack-k8s-operators-content-provider SUCCESS in 1h 38m 24s
✔️ podified-multinode-edpm-deployment-crc SUCCESS in 1h 20m 52s
❌ cifmw-crc-podified-edpm-baremetal RETRY_LIMIT in 12m 04s
✔️ cifmw-pod-zuul-files SUCCESS in 4m 41s
✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 8m 36s
✔️ cifmw-pod-pre-commit SUCCESS in 8m 05s
❌ build-push-container-cifmw-client TIMED_OUT in 1h 31m 15s

[danpawlik]

More context: some jobs might fail because the can be flaky, but we need to have result of another jobs.