Do not set user-visible name as additional agent information when copying provider

Instead we want the filename, which is more useful as an identifier anyways, because
we would otherwise have to check which user-visible names originate from which knsrc file.

CCBUG: 451165

src/core/engine.cpp

@@ -462,7 +462,7 @@ void Engine::atticaProviderLoaded(const Attica::Provider &atticaProvider)
         qCDebug(KNEWSTUFFCORE) << "Found provider: " << atticaProvider.baseUrl() << " but it does not support content";
         return;
     }
-    QSharedPointer<KNSCore::Provider> provider = QSharedPointer<KNSCore::Provider>(new AtticaProvider(atticaProvider, m_categories, d->name));
+    QSharedPointer<KNSCore::Provider> provider = QSharedPointer<KNSCore::Provider>(new AtticaProvider(atticaProvider, m_categories, d->configFileName));
     connect(provider.data(), &Provider::categoriesMetadataLoded, this, [this](const QList<Provider::CategoryMetadata> &categories) {
         d->categoriesMetadata = categories;
         Q_EMIT signalCategoriesMetadataLoded(categories);