MediaThumbnailFormatter => Calling ImageFormatter::__construct() without the $file_url_generator argument is deprecated in drupal:9.3.0

Problem/Motivation

Calling ImageFormatter::__construct() without the $file_url_generator argument is deprecated in drupal:9.3.0 and the $file_url_generator argument will be required in drupal:10.0.0. See https://www.drupal.org/node/2940031

Steps to reproduce

This field formatter extends its parent and needs to pass the right parameters in the constructor.

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet