Port away from deprecated methods
Fixes thigs like:
warning: ‘static QVector<KPluginMetaData> KPluginLoader::findPlugins(
const QString&, std::function<bool(const KPluginMetaData&)>)’
is deprecated: Since 5.86.
Use KPluginMetaData::findPlugins instead [-Wdeprecated-declarations]
similar to krdc!26 (merged)