Merge pull request #67688 from Lion-Wei/kube-proxy-config

Automatic merge from submit-queue (batch tested with PRs 64597, 67854, 67734, 67917, 67688). 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>.

Move kubeproxy ComponentConfig external types to `k8s.io/kube-proxy`

**What this PR does / why we need it**:
This PR implements most of kubernetes/community#2354 for the kube-proxy.
The PR:
- Moves k8s.io/kubernetes/pkg/proxy/apis/kubeproxyconfig as-is to k8s.io/kubernetes/pkg/proxy/apis/config as agreed
- Moves the external types to the new staging repo k8s.io/kube-proxy, in the k8s.io/kube-proxy/config/v1beta1 package.
- Makes k8s.io/kubernetes/pkg/proxy/apis/config/v1beta1 source the types from k8s.io/kube-proxy/config/v1beta1. The defaulting and conversion code is kept in this package as before.
- All references to these packages have been updated.

Ref #67233

**Special notes for your reviewer**:

**Release note**:
```release-note
kube-proxy v1beta1 external ComponentConfig types are now available in the `k8s.io/kube-proxy` repo
```

hack/.golint_failures

@@ -255,8 +255,8 @@ pkg/probe/exec
 pkg/probe/http
 pkg/probe/tcp
 pkg/proxy
-pkg/proxy/apis/kubeproxyconfig
-pkg/proxy/apis/kubeproxyconfig/v1alpha1
+pkg/proxy/apis/config
+pkg/proxy/apis/config/v1alpha1
 pkg/proxy/iptables
 pkg/proxy/userspace
 pkg/proxy/util
@@ -705,6 +705,7 @@ staging/src/k8s.io/kube-aggregator/pkg/controllers/autoregister
 staging/src/k8s.io/kube-aggregator/pkg/controllers/status
 staging/src/k8s.io/kube-aggregator/pkg/registry/apiservice
 staging/src/k8s.io/kube-aggregator/pkg/registry/apiservice/etcd
+staging/src/k8s.io/kube-proxy/config/v1alpha1
 staging/src/k8s.io/metrics/pkg/apis/custom_metrics
 staging/src/k8s.io/metrics/pkg/apis/custom_metrics/v1beta1
 staging/src/k8s.io/metrics/pkg/apis/custom_metrics/v1beta2