Automatic merge from submit-queue

Put initContainers to PodSpec for some statefulset examples.

**What this PR does / why we need it**:
Fixed https://github.com/kubernetes/kubernetes/issues/45405

The `init container` is [graduated to GA](https://github.com/kubernetes/kubernetes/pull/38382) , so some test YAML templates needs to be updated to not use `annotations`.

The following are the two places that needs update:
1. [cockroachdb](https://github.com/kubernetes/kubernetes/blob/master/examples/cockroachdb/cockroachdb-statefulset.yaml)
2. [e2e statefulset test](https://github.com/kubernetes/kubernetes/tree/master/test/e2e/testing-manifests/statefulset)

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

**Special notes for your reviewer**:

**Release note**:

```release-note
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