Revert "Fixing commit message: Change KeyValueFactory to use Settings instead of $conf"

core/core.services.yml

core/includes/install.core.inc

...ib/Drupal/Core/KeyValueStore/KeyValueExpirableFactory.php

core/lib/Drupal/Core/KeyValueStore/KeyValueFactory.php

core/lib/Drupal/Core/Path/AliasWhitelist.php

...s/simpletest/lib/Drupal/simpletest/DrupalUnitTestBase.php

...stem/Tests/KeyValueStore/DatabaseStorageExpirableTest.php

...b/Drupal/system/Tests/KeyValueStore/MemoryStorageTest.php

...lib/Drupal/system/Tests/KeyValueStore/StorageTestBase.php