Merge pull request #52753 from munnerz/sample-controller

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>.

sample-controller: add example CRD controller

**What this PR does / why we need it**:

Adds a sample-controller example repository

fixes #52752

**Special notes for your reviewer**:

This is currently based on the sttts:sttts-codegen-scripts branch and should not be merged until that is (ref https://github.com/kubernetes/kubernetes/pull/52186)

**Release note**:

```
Add sample-controller repository
```

/cc @sttts @nikhita @colemickens

hack/make-rules/helpers/cache_go_dirs.sh

@@ -39,7 +39,7 @@ function kfind() {
     # include the "special" vendor directories which are actually part
     # of the Kubernetes source tree - generators will use these for
     # including certain core API concepts.
-    find -H . ./vendor/k8s.io/apimachinery ./vendor/k8s.io/apiserver ./vendor/k8s.io/kube-aggregator ./vendor/k8s.io/apiextensions-apiserver ./vendor/k8s.io/metrics ./vendor/k8s.io/sample-apiserver ./vendor/k8s.io/api ./vendor/k8s.io/client-go ./vendor/k8s.io/code-generator \
+    find -H . ./vendor/k8s.io/apimachinery ./vendor/k8s.io/apiserver ./vendor/k8s.io/kube-aggregator ./vendor/k8s.io/apiextensions-apiserver ./vendor/k8s.io/metrics ./vendor/k8s.io/sample-apiserver ./vendor/k8s.io/api ./vendor/k8s.io/client-go ./vendor/k8s.io/code-generator ./vendor/k8s.io/sample-controller \
         \(                         \
         -not \(                    \
             \(                     \