Merge pull request #25022 from zhouhaibing089/sort-fix

Automatic merge from submit-queue

Support struct,array,slice types when sorting kubectl output

Fixes https://github.com/kubernetes/kubernetes/issues/24328.

Briefly, `sorting_printer` only take cares of the following type kinds:

*   `reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64`
*   `reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64`
*   `reflect.Float32, reflect.Float64`
*   `reflect.String`
*   `reflect.Ptr`

This commit aims to add `reflect.Struct, reflect.Slice, reflect.Array`.

/cc @bgrant0607

hack/test-cmd.sh

@@ -2049,6 +2049,7 @@ __EOF__
   kube::test::get_object_assert pods "{{range.items}}{{$id_field}}:{{end}}" ''
   # Command
   kubectl get pods --sort-by="{metadata.name}"
+  kubectl get pods --sort-by="{metadata.creationTimestamp}"
 
   ############################
   # Kubectl --all-namespaces #