The runners are loaded from the plugin info list Plasma::RunnerManager::listRunnerInfo(),
because of that there is no need to create a RunnerManager and initialize the plugins.
If you have a lot of additional plugins installed that do a lot of work in the init/reloadConfiguration
method the loading time of the KCM is notable slower.
Additionally the KCMUTILS_VERSION version check has been removed, because
the KF5_MIN_VERSION is 5.69.