Automatic merge from submit-queue (batch tested with PRs 47726, 47693, 46909, 46812) pod spec was not validating envFrom **What this PR does / why we need it**: adds missing validation for envFrom in a pod.spec.containers.envFrom fixes validation of pod.spec.containers.env.configMapRef.name fixes validation of pod.spec.containers.env.secretRef.name **Which issue this PR fixes** Fixes https://github.com/kubernetes/kubernetes/issues/46908