Issue #3207782 by nod_, bnjmnm, jptaranto: Add BC layer between @drupal/once and jQuery.once

core/core.libraries.yml

core/misc/jquery.once.bc.es6.js

core/misc/jquery.once.bc.js

...s/system/tests/modules/js_once_test/js_once_test.info.yml

...ystem/tests/modules/js_once_test/js_once_test.routing.yml

...ules/js_once_test/src/Controller/JsOnceTestController.php

core/tests/Drupal/Nightwatch/Tests/jsOnceTest.js