Utils: do not escape '\' in assert backtrace output on windows

Change-Id: Ib01a29f572b79f3cc323ab69b70a63408aa46af8
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/libs/utils/qtcassert.cpp

@@ -98,7 +98,7 @@ void dumpBacktrace(int maxdepth)
                            .arg(QString::fromLatin1(lineInfo.FileName),
                                 QString::number(lineInfo.LineNumber)));
         }
-        qDebug() << out;
+        qDebug().noquote() << out;
         if (++depth == maxdepth)
             break;
     }