text: Title: Fix staticcheck failures
  Body: from: https://prow.k8s.io/view/gcs/kubernetes-jenkins/pr-logs/pull/90183/pull-kubernetes-verify/1250761092716564483
  ```
  Errors from staticcheck:
  cmd/kubeadm/app/preflight/checks.go:806:12: possible nil pointer dereference (SA5011)
  cmd/kubeadm/app/preflight/checks.go:808:7: this check suggests that the pointer can be nil
  cmd/kubeadm/app/util/config/cluster_test.go:752:11: possible nil pointer dereference (SA5011)
  cmd/kubeadm/app/util/config/cluster_test.go:749:7: this check suggests that the pointer can be nil
  pkg/kubelet/stats/cri_stats_provider.go:705:32: possible nil pointer dereference (SA5011)
  pkg/kubelet/stats/cri_stats_provider.go:701:6: this check suggests that the pointer can be nil
  pkg/util/ipvs/ipvs_linux_test.go:184:20: the address of a variable cannot be nil (SA4022)
  pkg/volume/awsebs/aws_ebs_block_test.go:81:5: the address of a variable cannot be nil (SA4022)
  pkg/volume/azure_dd/azure_dd_block_test.go:70:5: the address of a variable cannot be nil (SA4022)
  pkg/volume/cinder/cinder_block_test.go:73:5: the address of a variable cannot be nil (SA4022)
  pkg/volume/gcepd/gce_pd_block_test.go:73:5: the address of a variable cannot be nil (SA4022)
  pkg/volume/gcepd/gce_pd_test.go:226:17: possible nil pointer dereference (SA5011)
  pkg/volume/gcepd/gce_pd_test.go:223:5: this check suggests that the pointer can be nil
  pkg/volume/gcepd/gce_pd_test.go:227:26: possible nil pointer dereference (SA5011)
  pkg/volume/gcepd/gce_pd_test.go:223:5: this check suggests that the pointer can be nil
  pkg/volume/rbd/rbd_test.go:89:5: the address of a variable cannot be nil (SA4022)
  pkg/volume/testing/testing.go:403:16: possible nil pointer dereference (SA5011)
  pkg/volume/testing/testing.go:404:5: this check suggests that the pointer can be nil
  pkg/volume/vsphere_volume/vsphere_volume_block_test.go:72:5: the address of a variable cannot be nil (SA4022)
  test/e2e/scheduling/predicates.go:1055:46: possible nil pointer dereference (SA5011)
  test/e2e/scheduling/predicates.go:1054:27: this check suggests that the pointer can be nil
  test/e2e/scheduling/predicates.go:1060:46: possible nil pointer dereference (SA5011)
  test/e2e/scheduling/predicates.go:1059:27: this check suggests that the pointer can be nil
  test/e2e/scheduling/predicates.go:1061:27: possible nil pointer dereference (SA5011)
  test/e2e/scheduling/predicates.go:1059:27: this check suggests that the pointer can be nil
  test/e2e_node/gke_environment_test.go:306:6: func checkDockerStorageDriver is unused (U1000)
  vendor/k8s.io/client-go/plugin/pkg/client/auth/azure/azure_test.go:124:24: possible nil pointer dereference (SA5011)
  vendor/k8s.io/client-go/plugin/pkg/client/auth/azure/azure_test.go:121:7: this check suggests that the pointer can be nil
  vendor/k8s.io/client-go/plugin/pkg/client/auth/azure/azure_test.go:128:10: possible nil pointer dereference (SA5011)
  vendor/k8s.io/client-go/plugin/pkg/client/auth/azure/azure_test.go:125:7: this check suggests that the pointer can be nil
  vendor/k8s.io/client-go/util/cert/csr_test.go:57:14: possible nil pointer dereference (SA5011)
  vendor/k8s.io/client-go/util/cert/csr_test.go:51:5: this check suggests that the pointer can be nil
  vendor/k8s.io/client-go/util/certificate/certificate_store_test.go:319:14: possible nil pointer dereference (SA5011)
  vendor/k8s.io/client-go/util/certificate/certificate_store_test.go:316:5: this check suggests that the pointer can be nil
  vendor/k8s.io/legacy-cloud-providers/azure/azure_test.go:1733:14: possible nil pointer dereference (SA5011)
  vendor/k8s.io/legacy-cloud-providers/azure/azure_test.go:1729:5: this check suggests that the pointer can be nil
  ```
  
  /good-first-issue