Merge pull request #66971 from tnozicka/informer-watcher

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>.

#50102 Task 2: Add UntilWithSync

**What this PR does / why we need it**:
This is a split off from https://github.com/kubernetes/kubernetes/pull/50102 to go in smaller pieces.

Introduces UntilWithSync based on informer.

**Needs https://github.com/kubernetes/kubernetes/pull/66906 first**
/hold

**Release note**:
```release-note
NONE
```

/priority important-soon
/kind bug
(bug after the main PR which is this split from)

Kubernetes-commit: c4f355a2ad9692f5459541d4e4d94fcbc5f7d946

vendor/k8s.io/api/admissionregistration/v1beta1/generated.proto

@@ -208,6 +208,15 @@ message Webhook {
   // Default to the empty LabelSelector, which matches everything.
   // +optional
   optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector namespaceSelector = 5;
+
+  // SideEffects states whether this webhookk has side effects.
+  // Acceptable values are: Unknown, None, Some, NoneOnDryRun
+  // Webhooks with side effects MUST implement a reconciliation system, since a request may be
+  // rejected by a future step in the admission change and the side effects therefore need to be undone.
+  // Requests with the dryRun attribute will be auto-rejected if they match a webhook with
+  // sideEffects == Unknown or Some. Defaults to Unknown.
+  // +optional
+  optional string sideEffects = 6;
 }
 
 // WebhookClientConfig contains the information to make a TLS