field Group and Version is missing when using KindFor method in discovery package

[zhouhaoA1]

What steps did you take and what happened:
i write a unit test, called KindFor(input schema.GroupVersionKind) (schema.GroupVersionResource, metav1.APIResource, error) method in discovery package.
Field Group and Version is missing in the returned schema.GroupVersionResource

What did you expect to happen:
the returned schema.GroupVersionResource contains Group、Version and Resource

The following information will help us better understand what's going on:

If you are using velero v1.7.0+:
Please use velero debug --backup <backupname> --restore <restorename> to generate the support bundle, and attach to this issue, more options please refer to velero debug --help

If you are using earlier versions:
Please provide the output of the following commands (Pasting long output into a GitHub gist or other pastebin is fine.)

• kubectl logs deployment/velero -n velero
• velero backup describe <backupname> or kubectl get backup/<backupname> -n velero -o yaml
• velero backup logs <backupname>
• velero restore describe <restorename> or kubectl get restore/<restorename> -n velero -o yaml
• velero restore logs <restorename>

Anything else you would like to add:
the returned gvr information is got from the key of h.kindMap. h.kindMap assignment needs to be checked

func (h *helper) KindFor(input schema.GroupVersionKind) (schema.GroupVersionResource, metav1.APIResource, error) {
	h.lock.RLock()
	defer h.lock.RUnlock()

	if resource, ok := h.kindMap[input]; ok {
		return schema.GroupVersionResource{
			Group:    resource.Group,
			Version:  resource.Version,
			Resource: resource.Name,
		}, resource, nil
	}

Environment:

• Velero version (use velero version):
• Velero features (use velero client config get features):
• Kubernetes version (use kubectl version):
• Kubernetes installer & version:
• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release):

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[ywk253100]

Fixed by #7530