OutputFormatter: Reduce usages of DebugFormat

This is usually used in a wrong or at least misleading way.
Replace most of the usages by newly introduced GeneralMessageFormat
as most of the replaced usages just print to General Messages and
using any of the existing formats would change the layout of the
text. Except for some special debug output inside the valgrind plugin
that can use one of the existing formats which also makes it easier
to spot them and the runners which print QC internal output.

Task-number: QTCREATORBUG-24560
Change-Id: I824dc4250b2f3e4656bab8676b45c98e3407d59c
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/qmlpreview/qmldebugtranslationwidget.cpp

@@ -424,7 +424,7 @@ void QmlDebugTranslationWidget::loadLogFile()
         if (f.open(QFile::ReadOnly)) {
             clear();
             while (!f.atEnd())
-                appendMessage(QString::fromUtf8(f.readLine()), Utils::DebugFormat);
+                appendMessage(QString::fromUtf8(f.readLine()), Utils::GeneralMessageFormat);
         } else {
             // TODO: maybe add this message to log and tasks
             qWarning() << "Failed to open" << fileName << ":" << f.errorString();