This issue is automatically created based on existing pull request: #39868: code refactor, php8.x adjustmentts, param types, etc

Description (*)

Just some type fixes + upgrade to php8.x
Needs to be tested and validated properly, as some method properties still do not match in core.

I've made this fix due to this code:

   $items = $this->optionManagement->getItems(
         Product::ENTITY,
         $attributeCode
   );

as it suppose to be an integer, but string has to be passed as the $1 parameter

Contribution checklist (*)

• Pull request has a meaningful description of its purpose

  All commits are accompanied by meaningful commit messages

  All new or changed code is covered with unit/integration tests (if applicable)

  README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update

  All automated tests passed successfully (all builds are green)
  To pick up a draggable item, press the space bar. While dragging, use the arrow keys to move the item. Press space again to drop the item in its new position, or press escape to cancel.