kubeflow: KFP builtin samples fail in KF1.0

/kind bug /area pipelines

What steps did you take and what happened: [A clear and concise description of what the bug is.]

1. Just run built in samples
2. All of them, except conditional sample fails (because conditional sample is the only one that never reads from gcs)

What did you expect to happen:

1. They should pass

Anything else you would like to add: [Miscellaneous information that will assist in solving the issue.] I think the problem is that pipeline-runner service account should be bound to workload identity. This is part of https://github.com/kubeflow/pipelines/issues/1691#issuecomment-569020262

Environment:

• Kubeflow version: 1.0
• kfctl version: kfctl v1.0-0-g94c35cf
• Kubernetes platform: gke
• Kubernetes version: (use kubectl version):

kubectl version
Client Version: version.Info{Major:"1", Minor:"14+", GitVersion:"v1.14.10-dispatcher", GitCommit:"f5757a1dee5a89cc5e29cd7159076648bf21a02b", GitTreeState:"clean", BuildDate:"2020-02-06T03:31:35Z", GoVersion:"go1.12.12b4", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"14+", GitVersion:"v1.14.10-gke.24", GitCommit:"f2734800eba37df4400813ab9340886059d56105", GitTreeState:"clean", BuildDate:"2020-02-05T18:38:43Z", GoVersion:"go1.12.12b4", Compiler:"gc", Platform:"linux/amd64"}

• OS (e.g. from /etc/os-release): mac