Fix more coding standards

I've rebased the branch on the latest dev and made some more coding standards fixes.

From the remaining ones, the type hints in FileFieldPathsTestBase cannot be added because that would make it incompatible with Drupal\Tests\file\Functional\FileFieldTestBase::createFileField().

For the deprecation warning, I'm not sure where to put @see to. Should it be to the issue the deprecation was added? Or would we need to create a change record first?

It is ready for review, so unassigning.

The PHP null coalesce operator ?? was used in the changes. That requires PHP 7.4. Could you add the PHP version requirement to the info.yml file?

I will merge this now, as I'm working on 📌 Update .gitlab-ci.yml file Needs work . I'll make further changes there. Thanks

Automatically closed - issue fixed for 2 weeks with no activity.