deepcopy: add interface deepcopy funcs

- add DeepCopyObject() to runtime.Object interface
- add DeepCopyObject() via deepcopy-gen
- add DeepCopyObject() manually
- add DeepCopySelector() to selector interfaces
- add custom DeepCopy func for TableRow.Cells

pkg/controller/garbagecollector/metaonly/types.go

@@ -23,6 +23,9 @@ import (
 // MetadataOnlyObject allows decoding only the apiVersion, kind, and metadata fields of
 // JSON data.
 // TODO: enable meta-only decoding for protobuf.
+//
+// +k8s:deepcopy-gen=true
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 type MetadataOnlyObject struct {
 	metav1.TypeMeta `json:",inline"`
 	// +optional
@@ -32,6 +35,9 @@ type MetadataOnlyObject struct {
 // MetadataOnlyObjectList allows decoding from JSON data only the typemeta and metadata of
 // a list, and those of the enclosing objects.
 // TODO: enable meta-only decoding for protobuf.
+//
+// +k8s:deepcopy-gen=true
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 type MetadataOnlyObjectList struct {
 	metav1.TypeMeta `json:",inline"`
 	// +optional