Automatic merge from submit-queue (batch tested with PRs 66394, 66888, 66932). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Promote internal/external informers into master.Config

**Release note**:

```release-note
NONE
```
xref #66386

Shorten `BuildGenericConfig`'s return list. 
Put the internal and external informers into master.Config. Previous art:


[https://github.com/kubernetes/kubernetes/blob/60614d5cdc28793c72f7a08aa40be8ed0ccda7c5/staging/src/k8s.io/apiserver/pkg/server/config.go#L196](https://github.com/kubernetes/kubernetes/blob/60614d5cdc28793c72f7a08aa40be8ed0ccda7c5/staging/src/k8s.io/apiserver/pkg/server/config.go#L196)