Issue #2449809 by JeroenT, tadityar: Remove usage of update_get_projects()

core/modules/locale/locale.api.php

core/modules/update/src/Tests/UpdateContribTest.php

core/modules/update/src/UpdateFetcherInterface.php

core/modules/update/src/UpdateManager.php

core/modules/update/src/UpdateManagerInterface.php

core/modules/update/src/UpdateProcessorInterface.php

core/modules/update/tests/src/Unit/UpdateFetcherTest.php

core/modules/update/update.api.php

core/modules/update/update.compare.inc

core/modules/update/update.module