Make AbstractFormContractor a non abstract class and refacto others builders

[VincentLanglet]

Feature Request

@franmomu The AbstractFormContractor in master is

• fully implementing the FormContractorInterface.
• full of final methods.
• Extending as if, in persistence bundle: https://github.com/sonata-project/SonataDoctrineORMAdminBundle/blob/master/src/Builder/FormContractor.php

I think we should change it to a real class instead.

[franmomu]

👍 I have pending when I find some time to see the other builders, at least ListBuilder and ShowBuilder I remember they seemed easy to replace (no need to do it before 4.0).

[VincentLanglet]

I just had to improve the fixtures in tests of the ListBuilder and ShowBuilder in order to correctly support FieldDescriptionInterface::TYPE_ARRAY https://github.com/sonata-project/SonataAdminBundle/pull/7448/commits/8ef3ea91e249f1bec3d9b5594f4101352b2be027

There is definitely something to do I discovered we provide an abstract extension in SonataAdmin to be used by persistence bundles https://github.com/sonata-project/SonataAdminBundle/blob/4.x/src/DependencyInjection/AbstractSonataAdminExtension.php

It would be nice to move the template.types.show/list config from persistence to admin bundle and to have a default support for all the FieldDescriptionInterface::TYPE_* field, since the constant and the template is provided by SonataAdmin.

[github-actions[bot]]

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