[meta] Olivero JavaScript coding standards fixes

Various issues that need to be addressed before becoming stable in core.

• #3153234: [Meta] Olivero JavaScript should be selecting [data-drupal-selector] attributes where possible
• #3156208: Coding standards review and fix - JS files
• #3173832: Ensure Olivero's JS documentation matches standards
• #3173900: Refactor Olivero's JavaScript Drupal behaviors to use once()
• #3173901: JavaScript: missing parameters in a few closures (scripts, navigation, second-level-navigation)
• #3173903: JavaScript Pass data between functions via Drupal object (instead of drupalSettings)
• #3173905: Olivero: node.classList.remove() only supports one argument
• #3208372: Olivero: Refactor comments.es6.js