Automatic merge from submit-queue (batch tested with PRs 41112, 41201, 41058, 40650, 40926)

verify: Use macOS compatible copying method

**What this PR does / why we need it**:
Similar to the fix in #34944, this fixes issues in the `make verify` tests, by using a copy method that is compatible with macOS and the bsd version of `cp`.

Before fix:
```
Verifying hack/make-rules/../../hack/verify-codegen.sh
cp: illegal option -- T
usage: cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file target_file
       cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file ... target_directory
FAILED   hack/make-rules/../../hack/verify-codegen.sh	0s
```

After fix:
```
Verifying hack/make-rules/../../hack/verify-codegen.sh
Building client-gen
Building lister-gen
Building informer-gen
diffing cmd/kube-aggregator/hack/../pkg against freshly generated codegen
cmd/kube-aggregator/hack/../pkg up to date.
+++ [0128 10:06:48] Building the toolchain targets:
    k8s.io/kubernetes/hack/cmd/teststale
    k8s.io/kubernetes/vendor/github.com/jteeuwen/go-bindata/go-bindata
+++ [0128 10:06:48] Generating bindata:
    test/e2e/generated/gobindata_util.go
/opt/gopath/src/k8s.io/kubernetes /opt/gopath/src/k8s.io/kubernetes/test/e2e/generated
/opt/gopath/src/k8s.io/kubernetes/test/e2e/generated
+++ [0128 10:06:49] Building go targets for darwin/amd64:
    cmd/libs/go2idl/client-gen
    cmd/libs/go2idl/lister-gen
    cmd/libs/go2idl/informer-gen
Building client-gen
Building lister-gen
Building informer-gen
SUCCESS  hack/make-rules/../../hack/verify-codegen.sh	59s
```

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```