Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Use `pkg/util/pointer` functions instead of self-written versions

**What this PR does / why we need it**:
Replaces instances of module-written `int(32|64)? --> *int(32|64)?` functions with functions from k8s.io/kubernetes/pkg/util/pointer

**Special notes for your reviewer**:

Here's the grep used, based on the comments in:
* https://github.com/kubernetes/kubernetes/pull/59924#issuecomment-366119396
* https://github.com/kubernetes/kubernetes/issues/59971#issue-297766556

```bash
$ git grep -E 'func\ [^ (]+\([^ ]+\ int(32|64)?\)\ \*int(32|64)?' !(vendor|staging) | grep -v pkg/util/pointer

pkg/apis/apps/v1/defaults_test.go:func newInt32(val int32) *int32 {
pkg/apis/apps/v1beta1/defaults_test.go:func newInt32(val int32) *int32 {
pkg/apis/apps/v1beta2/defaults_test.go:func newInt32(val int32) *int32 {
pkg/apis/autoscaling/v1/defaults_test.go:func newInt32(val int32) *int32 {
pkg/apis/autoscaling/v2beta1/defaults_test.go:func newInt32(val int32) *int32 {
pkg/apis/autoscaling/validation/validation_test.go:func newInt32(val int32) *int32 {
pkg/apis/batch/v1/defaults_test.go:func newInt32(val int32) *int32 {
pkg/apis/batch/v1beta1/defaults_test.go:func newInt32(val int32) *int32 {
pkg/apis/core/v1/defaults_test.go:func newInt(val int32) *int32 {
pkg/apis/core/validation/validation_test.go:func newInt32(val int) *int32 {
pkg/apis/extensions/v1beta1/defaults_test.go:func newInt32(val int32) *int32 {
pkg/controller/deployment/sync_test.go:func intOrStrP(val int) *intstr.IntOrString {
pkg/kubectl/autoscale_test.go:func newInt32(value int) *int32 {
plugin/pkg/admission/security/podsecuritypolicy/admission_test.go:func userIDPtr(i int) *int64 {
plugin/pkg/admission/security/podsecuritypolicy/admission_test.go:func groupIDPtr(i int) *int64 {
test/e2e/apps/deployment.go:func intOrStrP(num int) *intstr.IntOrString {
test/e2e/auth/pod_security_policy.go:func intPtr(i int64) *int64 {
test/integration/deployment/util.go:func intOrStrP(num int) *intstr.IntOrString {
```

**Release note**:

```release-note
NONE
```
/kind cleanup
/cc @php-coder 
/assign @tallclair