Automatic merge from submit-queue

Deployment: Fully Respect ControllerRef

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

This is part of the completion of the [ControllerRef](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/controller-ref.md) proposal. It brings Deployment into full compliance with ControllerRef. See the individual commit messages for details.

**Which issue this PR fixes**:

This ensures that Deployment does not fight with other controllers over control of Pods and ReplicaSets.

Ref: https://github.com/kubernetes/kubernetes/issues/24433

**Special notes for your reviewer**:

**Release note**:

```release-note
Deployment now fully respects ControllerRef to avoid fighting over Pods and ReplicaSets. At the time of upgrade, **you must not have Deployments with selectors that overlap**, or else [ownership of ReplicaSets may change](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/controller-ref.md#upgrading).
```
cc @erictune @kubernetes/sig-apps-pr-reviews