Remove deprecated code. (#4324)
* Feat: replace system_rebuild_module_data()
* Feat: replace REQUEST_TIME
* Feat: replace format_date()
* Feat: remove update_fix_compatibility()
https://www.drupal.org/node/3026100
* Feat: replace user_load()
* Feat: replace CONFIG_SYNC_DIRECTORY
* Feat: replace drupal_get_profile()
* Feat: replace config_get_config_directory()
* Feat: replace prepareLegacyRequest()
* Feat: replace ResourcePluginManager->getInstance()
* Feat: replace Drupal\simpletest\TestDiscovery
* Feat: replace db_insert()
* Fix: module installed detection using module_handler service
* Remove the interaction part, because in Drupal 9 we have only one config folder.
* Use imports of the classes instead of full classified name of the class.
* Use dependency injection instead of direct call of \Drupal::service.
* Use dependency injection instead of direct call of \Drupal::service in Uninstall command class.
* Move vars outside loops.
* Use dependency injection instead of direct call of \Drupal::service in Manager class.
* Set Drupal console version 1.9.8.
Co-authored-by: Simon <s.foster@tabs-software.co.uk>
