### What would you like to be added?

- [ ] verify that no new features are added through `utilfeature.DefaultMutableFeatureGate.Add` but should use `utilfeature.DefaultMutableFeatureGate.AddVersioned` instead.
- [ ]  verify `DefaultKubeEffectiveVersion` is up to date.
        * some script like verifying `DefaultKubeEffectiveVersion` is consistent with the release tag N for beta, and tolerates either N or N-1 with alpha

### Why is this needed?

To make sure https://github.com/kubernetes/enhancements/issues/4330 works properly, and not misused. 
verification machinery for compatibility version
This is a GitHub Issue
repo:kubernetes
owner:kubernetes
Title : verification machinery for compatibility version
Issue date:

--- start body ---
### What would you like to be added?

- [ ] verify that no new features are added through `utilfeature.DefaultMutableFeatureGate.Add` but should use `utilfeature.DefaultMutableFeatureGate.AddVersioned` instead.
- [ ]  verify `DefaultKubeEffectiveVersion` is up to date.
        * some script like verifying `DefaultKubeEffectiveVersion` is consistent with the release tag N for beta, and tolerates either N or N-1 with alpha

### Why is this needed?

To make sure https://github.com/kubernetes/enhancements/issues/4330 works properly, and not misused. 
--- end body ---
