Replace jQuery.once with drupal/once

@jofitz
You didn't fix it well at all. It must be added once to the library. in js it has to import once. and it must use $().each and not once.forEach, because it uses $(this). Remove your merge request and fixed with my patch

Couldn't apply patch from #4, so re-adding

Patch in #5 works great. I'm setting this as RTBC!

Extra things done:
- Updated the MR to match its changes
- Changed the info.yml file since according to the documentation → the core/once is not available before 9.2.0; this means the new version won't support Drupal 8.8.

Also attaching patch from latest MR diff.