Test media type configuration no longer valid in Drupal 9.4.x

[whikloj]

Starting sometime between April 2nd and 18th, 2022. A change in the Drupal 9.4.x-dev branch causes this configuration yaml to fail to validate.

Error is

1) Drupal\Tests\islandora\Functional\IslandoraImageFormatterTest::testIslandoraImageFormatter
Drupal\Core\Config\Schema\SchemaIncompleteException: Schema errors for core.entity_view_display.media.test_image_media_type.default with the following errors: core.entity_view_display.media.test_image_media_type.default:content.field_media_image.settings.image_loading missing schema

/opt/drupal/web/core/lib/Drupal/Core/Config/Development/ConfigSchemaChecker.php:94
/opt/drupal/web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php:142
/opt/drupal/web/core/lib/Drupal/Core/Config/Config.php:229
/opt/drupal/web/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php:274
/opt/drupal/web/core/lib/Drupal/Core/Entity/EntityStorageBase.php:520
/opt/drupal/web/core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php:253
/opt/drupal/web/core/lib/Drupal/Core/Entity/EntityBase.php:339
/opt/drupal/web/core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php:607
/home/runner/work/islandora/islandora/build_dir/tests/src/Functional/IslandoraImageFormatterTest.php:42
/opt/drupal/vendor/phpunit/phpunit/src/Framework/TestResult.php:703

This will need to be fixed to avoid on going failures.

[whikloj]

This seems to be the change that altered the schema.
https://www.drupal.org/project/drupal/issues/3173180