Automatic merge from submit-queue
Remove imports of k8s.io/client-go/pkg/api
k8s.io/client-go/pkg/api will be eliminated by #44784, so we need to remove all imports of it.
This PR is large, but mostly simple changes, like:
* using constants defined in the v1 package instead of those in the internal package
* using k8s.io/client-go/kubernetes/scheme.Codecs/Schemes instead of those in k8s.io/client-go/pkg/api
* using `v1.SchemeGroupVersion` instead of `api.Registry.GroupOrDie(api.GroupName).GroupVersion` in tests
* importing `k8s.io/kubernetes/pkg/api` instead of `k8s.io/client-go/pkg/api` if possible
With this PR https://github.com/kubernetes/kubernetes/pull/45159, the only remaining imports of `k8s.io/client-go/pkg/api` are from k8s.io/metrics.
``` bash
$ git grep "\"k8s.io/client-go/pkg/api\"" | grep -v "staging/src/k8s.io/client-go/pkg/api"
staging/src/k8s.io/metrics/pkg/apis/custom_metrics/install/install.go:25: "k8s.io/client-go/pkg/api"
Binary file staging/src/k8s.io/metrics/pkg/apis/custom_metrics/types.generated.go matches
staging/src/k8s.io/metrics/pkg/apis/custom_metrics/types.go:22: "k8s.io/client-go/pkg/api"
staging/src/k8s.io/metrics/pkg/apis/metrics/install/install.go:26: "k8s.io/client-go/pkg/api"
staging/src/k8s.io/metrics/pkg/apis/metrics/types.go:21: "k8s.io/client-go/pkg/api"
Binary file staging/src/k8s.io/metrics/pkg/apis/metrics/v1alpha1/zz_generated.conversion.go matches
Binary file staging/src/k8s.io/metrics/pkg/apis/metrics/zz_generated.deepcopy.go matches
staging/src/k8s.io/metrics/pkg/client/clientset_generated/clientset/fake/clientset_generated.go:24: "k8s.io/client-go/pkg/api"
staging/src/k8s.io/metrics/pkg/client/custom_metrics/client.go:26: "k8s.io/client-go/pkg/api"
staging/src/k8s.io/metrics/pkg/client/custom_metrics/fake/fake_client.go:24: "k8s.io/client-go/pkg/api"
```
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