Add explicit kubeflow test groups.

Prow incorrectly calculates the GCS location of non-kubernetes
postsubmits. This has the dual effect of decorated jobs being uploaded
to the wrong place, and the testgrid configurator looking in the
wrong place.

config/testgrids/kubeflow/OWNERS

@@ -0,0 +1,4 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+approvers:
+- jlewi

config/testgrids/kubeflow/kubeflow.yaml

@@ -0,0 +1,36 @@
+# Temporary kubeflow overrides until we fix prow to calculate correct paths.
+test_groups:
+- name: kubeflow-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_kubeflow/kubeflow-postsubmit
+- name: kubeflow-examples-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_kubeflow/kubeflow-examples-postsubmit
+- name: kubeflow-pytorch-operator-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_pytorch-operator/kubeflow-pytorch-operator-postsubmit
+- name: kubeflow-mxnet-operator-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_mxnet-operator/kubeflow-mxnet-operator-postsubmit
+- name: kubeflow-reporting-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_reporting/kubeflow-reporting-postsubmit
+- name: kubeflow-testing-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_testing/kubeflow-testing-postsubmit
+- name: kubeflow-tf-operator-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_tf-operator/kubeflow-tf-operator-postsubmit
+- name: kubeflow-katib-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_katib/kubeflow-katib-postsubmit
+- name: kubeflow-experimental-kvc-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_experimental-kvc/kubeflow-experimental-kvc-postsubmit
+- name: kubeflow-experimental-seldon-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_experimental-seldon/kubeflow-experimental-seldon-postsubmit
+- name: kubeflow-experimental-beagle-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_experimental-beagle/kubeflow-experimental-beagle-postsubmit
+- name: kubeflow-caffe2-operator-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_caffe2-operator/kubeflow-caffe2-operator-postsubmit
+- name: kubeflow-website-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_website/kubeflow-website-postsubmit
+- name: kubeflow-kubebench-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_kubebench/kubeflow-kubebench-postsubmit
+- name: kubeflow-mpi-operator-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_mpi-operator/kubeflow-mpi-operator-postsubmit
+- name: kubeflow-chainer-operator-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_chainer-operator/kubeflow-chainer-operator-postsubmit
+- name: kubeflow-arena-postsubmit
+  gcs_prefix: kubernetes-jenkins/logs/kubeflow_arena/kubeflow-arena-postsubmit