Upgrade Sonata to v4

[jordisala1991]

Subject

I am targeting this branch, because this is BC break

Not closing issues but there are some PRs with some of this code.

Changelog

### Added
- Add Compatibility with Sonata 4.

[jordisala1991]

1) Sonata\MediaBundle\Tests\Provider\BaseProviderTest::testBuildEditForm
Undefined index: translation_domain

/home/runner/work/SonataMediaBundle/SonataMediaBundle/vendor/sonata-project/admin-bundle/src/Form/FormMapper.php:118
/home/runner/work/SonataMediaBundle/SonataMediaBundle/tests/Provider/BaseProviderTest.php:190
/home/runner/work/SonataMediaBundle/SonataMediaBundle/tests/Provider/AbstractProviderTest.php:77

A lot of this errors appear. @VincentLanglet can you help me? This comes from the admin-bundle, not sure if a bug or I am missing something.

[VincentLanglet]

I would change

if ($group['translation_domain'] && !isset($fieldDescriptionOptions['translation_domain'])) {
    $fieldDescriptionOptions['translation_domain'] = $group['translation_domain'];
}

to

if (isset($group['translation_domain']) && !isset($fieldDescriptionOptions['translation_domain'])) {
     $fieldDescriptionOptions['translation_domain'] = $group['translation_domain'];
}

(or isset($group['translation_domain']) && $group['translation_domain'])

Can you try it ?

[jordisala1991]

Solved by not mocking the admin.

[jordisala1991]

Needs: sonata-project/dev-kit#1558