generate_print_a11y_script - use passive eventlisteners and use pointerdown

[diggeddy]

Description

Reduce INP impact of script by making event listeners passive.
Use pointerdown to work with touch devices.

eg.

!function(){"use strict";var e=document.body;e.addEventListener("pointerdown",()=>e.classList.add("using-mouse"),{passive:!0}),e.addEventListener("keydown",()=>e.classList.remove("using-mouse"),{passive:!0});}();

Related to #659