Merge pull request #51186 from dixudx/fix_delete_uninitialized_resources

Automatic merge from submit-queue (batch tested with PRs 51186, 50350, 51751, 51645, 51837)

fix bug on kubectl deleting uninitialized resources

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

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #51185

**Special notes for your reviewer**:
/assign @caesarxuchao @ahmetb 

**Release note**:

```release-note
fix bug on kubectl deleting uninitialized resources
```

hack/testdata/deployment-with-initializer.yaml

@@ -0,0 +1,25 @@
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: web
+  labels:
+    run: web
+  initializers:
+    pending:
+    - name: podimage.initializer.com
+spec:
+  replicas: 5
+  selector:
+    matchLabels:
+      run: web
+  template:
+    metadata:
+      labels:
+        run: web
+    spec:
+      containers:
+      - image: nginx:1.10
+        name: web
+        ports:
+        - containerPort: 80
+          protocol: TCP

hack/testdata/replicaset-with-initializer.yaml

@@ -0,0 +1,23 @@
+apiVersion: extensions/v1beta1
+kind: ReplicaSet
+metadata:
+  name: nginx
+  initializers:
+    pending:
+    - name: podimage.initializer.com
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: nginx
+  template:
+    metadata:
+      name: nginx
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:1.10
+        ports:
+        - containerPort: 80