Fix tests and restore redirection test

Phpunit is failing because there is a broken/wrong serialized value in modules/contrib/entity_legal/tests/fixtures/update/install_entity_legal.php:88

We can verify this by throwing the exception in \Drupal\Core\KeyValueStore\DatabaseStorage::getMultiple instead of muting it. See this https://3v4l.org/mr8AW
It fails on PHP 8.3 but not on lower versions, which explains the issue.
I will fix it in this MR.

Looks good, thank you!

Here are some issues I think we can fix:

• Let's enforce PHPCS, PHPStan by adding to .gitlab-ci.yml:
  

    phpstan:
      allow_failure: false
    phpcs:
      allow_failure: false
    

• Create a followup to fix and enforce cspell too
• Resolve the issue with Drupal 11 failure in PHPStan and PHPUnit. If we cannot add : string to our method, let's drop it and create our own ::randomLowercaseMachineName()

Thanks @Claudiu,

I propose to fix cspell here directly, but I can always create a new issue and move the commit there if you prefer.
Most of those are obvious except I added exclusions for "please" from \Drupal\entity_legal\Plugin\EntityLegal\Message::execute, just in case site owners translated the string.

Thank you!

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