Discussions during the Yukawa Institute for Theoretical Physics (YITP) summer school YITP-W-22-13 on "A novel numerical approach to quantum field theories” were useful as we started this work.
The author would like to thank the summer school on "A novel numerical approach to quantum field theories" at the Yukawa Institute for Theoretical Physics (YITP-W-22-13) for giving him/her a chance to deepen their ideas.