Allow adding entry_options to collections field

[wizhippo]

This adds the ability to pass entry options to a collections field.

The use case for example is using a collection of VichFileType's and you want to pass options on to the child forms such as the download_uri.

            CollectionField::new('attachments', 'Attachments')
                ->setEntryType(VichFileType::class)
                ->setEntryOptions([
                    'download_label' => 'Download',
                    'download_uri' => function ($entity) {
                        if (!$entity || !$entity->getFile() || !$entity->getFile()->getName()) {
                            return null;
                        }

                        return $this->generateUrl('easyadmin_entity_download', [
                            'attachmentId' => $entity->getId(),
                        ]);
                    },
                ])
                ...