test:
[sig-cli] Kubectl client [k8s.io] Kubectl client-side validation should create/apply a valid CR with arbitrary-extra properties for CRD with partially-specified validation schema 

is failing frequently in CI, see search results:
https://search.ci.openshift.org/?maxAge=168h&context=1&type=bug%2Bjunit&name=&maxMatches=5&maxBytes=20971520&groupBy=job&search=%5C%5Bsig-cli%5C%5D+Kubectl+client+%5C%5Bk8s%5C.io%5C%5D+Kubectl+client-side+validation+should+create%2Fapply+a+valid+CR+with+arbitrary-extra+properties+for+CRD+with+partially-specified+validation+schema

https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/release-openshift-ocp-installer-e2e-gcp-4.2/1313996753745219584

fail [k8s.io/kubernetes/test/e2e/kubectl/kubectl.go:959]: Oct  8 01:07:18.957: failed to create CR {"kind":"E2e-test-kubectl-9824-crd","apiVersion":"kubectl-crd-test.k8s.io/v1","metadata":{"name":"test-cr"},"spec":{"bars":[{"name":"test-bar"}],"extraProperty":"arbitrary-value"}} in namespace --namespace=e2e-kubectl-1441: error running &{/usr/bin/kubectl [kubectl --server=https://api.ci-op-pmlqcqk4-ee183.origin-ci-int-gce.dev.openshift.com:6443 --kubeconfig=/tmp/admin.kubeconfig --namespace=e2e-kubectl-1441 create --validate=true -f -] []  0xc003f72580  error: error validating "STDIN": error validating data: ValidationError(E2e-test-kubectl-9824-crd.spec): unknown field "extraProperty" in io.k8s.kubectl-crd-test.v1.E2e-test-kubectl-9824-crd.spec; if you choose to ignore these errors, turn validation off with --validate=false
 [] <nil> 0xc003f1f410 exit status 1 <nil> <nil> true [0xc002663ea0 0xc002663ec8 0xc002663ed8] [0xc002663ea0 0xc002663ec8 0xc002663ed8] [0xc002663ea8 0xc002663ec0 0xc002663ed0] [0x95bdc0 0x95bef0 0x95bef0] 0xc003f51d40 <nil>}:
Command stdout:

stderr:
error: error validating "STDIN": error validating data: ValidationError(E2e-test-kubectl-9824-crd.spec): unknown field "extraProperty" in io.k8s.kubectl-crd-test.v1.E2e-test-kubectl-9824-crd.spec; if you choose to ignore these errors, turn validation off with --validate=false

error:
exit status 1