Call to undefined function Drupal\entity_embed\Plugin\CKEditorPlugin\drupal_get_path()

Problem/Motivation

By upgrading to Drupal 10 and keeping CKEditor 4, I encountered a fatal error:

Steps to reproduce

1. Upgrading to Drupal 10.x.
2. Configure the text formats which are already using Entity Embed plugin.
3. Observe the fatal error.

Proposed resolution

Replace drupal_get_path('module', 'X') by \Drupal::service('extension.list.module')->getPath('X')