Issue #3291097 by DYdave: Fixed broken testst for Drupal 9.4, due to position...

Issue #3291097 by DYdave: Fixed broken testst for Drupal 9.4, due to position change of attribute loading='lazy' in HTML output generated by core image formatter. Changed 'ImageLinkFormatterTest::' property declaration to 'protected' to fix phpunit deprecation message.