Tasks: Create a container class for category data

Reduce the number of arguments that need to be passed around.

Change-Id: I9fbfdcdf7b20f8f26e35f435bf8d65ba483e4114
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/python/pythonplugin.cpp

@@ -70,7 +70,7 @@ void PythonPlugin::extensionsInitialized()
                                                                ::Constants::FILEOVERLAY_PY);
     FileIconProvider::registerIconOverlayForSuffix(imageFile, "py");
 
-    TaskHub::addCategory(PythonErrorTaskCategory, "Python", true);
+    TaskHub::addCategory({PythonErrorTaskCategory, "Python", true});
 }
 
 } // Python::Internal