stop using deprecated klog flags

Some scripts and tools still relied on the deprecated flags, the ones
which are about to be removed.

This is intentionally not a complete removal of all those flags in the entire
repo. This would lead to much more code churn also in places where commands
still accept the flags because they use klog directly.

hack/jenkins/benchmark-dockerized.sh

@@ -66,7 +66,8 @@ cd "${GOPATH}/src/k8s.io/kubernetes"
 ./hack/install-etcd.sh
 
 # Run the benchmark tests and pretty-print the results into a separate file.
-make test-integration WHAT="$*" KUBE_TEST_ARGS="-run='XXX' -bench=${TEST_PREFIX:-.} -benchtime=${BENCHTIME:-1s} -benchmem  -alsologtostderr=false -logtostderr=false -data-items-dir=${ARTIFACTS}" \
+# Log output of the tests go to stderr.
+make test-integration WHAT="$*" KUBE_TEST_ARGS="-run='XXX' -bench=${TEST_PREFIX:-.} -benchtime=${BENCHTIME:-1s} -benchmem  -data-items-dir=${ARTIFACTS}" \
   | (go run test/integration/benchmark/extractlog/main.go) \
   | tee \
    >(prettybench -no-passthrough > "${ARTIFACTS}/BenchmarkResults.txt") \