AssociationField on nested properties fails

[KDederichs]

Describe the bug
When you are trying to access an association through a nested property it fails with
Association name expected, 'foo.bar' is not an association.

To Reproduce
Try to access an association through a nested property:
AssociationField::new('foo.bar', 'Bar'),

(OPTIONAL) Additional context

InvalidArgumentException:
Association name expected, 'foo.bar' is not an association.

  at vendor/doctrine/orm/src/Mapping/ClassMetadata.php:2547
  at Doctrine\ORM\Mapping\ClassMetadata->getAssociationTargetClass('foo.bar')
     (vendor/easycorp/easyadmin-bundle/src/Field/Configurator/AssociationConfigurator.php:59)
  at EasyCorp\Bundle\EasyAdminBundle\Field\Configurator\AssociationConfigurator->configure(object(FieldDto), object(EntityDto), object(AdminContext))
     (vendor/easycorp/easyadmin-bundle/src/Factory/FieldFactory.php:106)
  at EasyCorp\Bundle\EasyAdminBundle\Factory\FieldFactory->processFields(object(EntityDto), object(FieldCollection), 'index')
     (vendor/easycorp/easyadmin-bundle/src/Factory/FieldFactory.php:132)
  at EasyCorp\Bundle\EasyAdminBundle\Factory\FieldFactory->processFieldsForAll(object(EntityCollection), object(FieldCollection), 'index')
     (vendor/easycorp/easyadmin-bundle/src/Controller/AbstractCrudController.php:158)
  at EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractCrudController->index(object(AdminContext))
     (vendor/symfony/http-kernel/HttpKernel.php:183)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
     (vendor/symfony/http-kernel/HttpKernel.php:76)
  at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
     (vendor/symfony/http-kernel/Kernel.php:191)
  at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
     (vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php:35)
  at Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run()
     (vendor/autoload_runtime.php:32)
  at require_once('/app/vendor/autoload_runtime.php')
     (public/index.php:5)      

Maybe @Seb33300 can take a look since he's cleaning up related bugs atm :)

[Seb33300]

It's quite similar to #7500 and should be "easy" to fix if this PR is merged (by reusing resolveNestedAssociations())

I will try to take a look if #7500 is merged.

[KDederichs]

Same issue exists with CollectionFields btw.

RuntimeException:
The "foo.bar" collection field of "App\Controller\Admin\TestController" cannot use the "useEntryCrudForm()" method because it is not a Doctrine association.

  at vendor/easycorp/easyadmin-bundle/src/Field/Configurator/CollectionConfigurator.php:130
  at EasyCorp\Bundle\EasyAdminBundle\Field\Configurator\CollectionConfigurator->configureEntryType(object(FieldDto), object(EntityDto), object(AdminContext))
     (vendor/easycorp/easyadmin-bundle/src/Field/Configurator/CollectionConfigurator.php:84)
  at EasyCorp\Bundle\EasyAdminBundle\Field\Configurator\CollectionConfigurator->configure(object(FieldDto), object(EntityDto), object(AdminContext))
     (vendor/easycorp/easyadmin-bundle/src/Factory/FieldFactory.php:106)
  at EasyCorp\Bundle\EasyAdminBundle\Factory\FieldFactory->processFields(object(EntityDto), object(FieldCollection), 'edit')
     (vendor/easycorp/easyadmin-bundle/src/Controller/AbstractCrudController.php:233)
  at EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractCrudController->edit(object(AdminContext))
     (vendor/symfony/http-kernel/HttpKernel.php:183)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
     (vendor/symfony/http-kernel/HttpKernel.php:76)
  at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
     (vendor/symfony/http-kernel/Kernel.php:191)
  at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
     (vendor/symfony/runtime/Runner/Symfony/HttpKernelRunner.php:35)
  at Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run()
     (vendor/autoload_runtime.php:32)
  at require_once('/app/vendor/autoload_runtime.php')
     (public/index.php:5)