Fairing needs to own its own test infra

[Bobgy]

Google will no longer support Kubeflow common test infra.

Other WGs have migrated to Github Actions and/or an optional test infra supported by AWS: http://bit.ly/kubeflow-test-infra-aws.

[Bobgy]

/assign @jinchihe

Regardless of WG sponsorship decision, this is what you'd need to start now.

/kind process

[Bobgy]

I took a quick look at https://github.com/kubeflow/fairing/blob/master/prow_config.yaml, it contains some outdated definition of an argo workflow, it's no longer supported by the Tekton driven test infra. It's broken any way, so I'll remove test-infra support soon.