Merge pull request #35663 from janetkuo/statefulset

Automatic merge from submit-queue

Rename PetSet to StatefulSet

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**What this PR does / why we need it**: #35534

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

**Special notes for your reviewer**: cc @erictune @foxish @kubernetes/sig-apps @ymqytw 

**Release note**:
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cluster/addons/calico-policy-controller/calico-etcd-petset.yaml

@@ -1,5 +1,5 @@
 apiVersion: "apps/v1alpha1"
-kind: PetSet
+kind: StatefulSet
 metadata:
   name: calico-etcd
   namespace: kube-system