efl_ui_clickable_util was only for efl_input_clickable interface,
but there can be more cases which want to connect object event
to specific action interfaces (such as scrolling) in the future.
For that extension, efl_ui_action_connector seems better.
ref: T7847
Reviewed-by: Marcel Hollerbach <mail@marcel-hollerbach.de>
Differential Revision: https://phab.enlightenment.org/D9486
WooHyun Jung