karmada-search error log: Could not dynamically add mapping for field [app.name]. Existing mapping for [metadata.labels.app] must be of type object but found [text].
Co-authored-by: liys87x <liyasong1987x@gmail.com>
Signed-off-by: huntsman_ly <huntsman_ly@sina.com>
Since `SingleClusterInformerManager.ForResource` uses `==` to determine whether the handler exists, `backendstore.Default` need to return a comparable `cache.ResourceEventHandler`.
Co-authored-by: liys87x <liyasong1987x@gmail.com>
Signed-off-by: huntsman_ly <huntsman_ly@sina.com>