Add GCI testing for kubernetes-e2e-gke-alpha-features
Add GCI testing for kubernetes-e2e-gke-alpha-features

Job,GCE Project
`kubernetes-e2e-gci-gke-alpha-features`,`k8s-jkns-e2e-gci-gke-alpha`

GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid