Utils: Rename QtcProcess::readAllStandard* to readAllRawStandard*

... and re-use the old QtcProcess::readAllStandard* names for
a QString-returning 'decoded' version.

For now, only use that in 'full Utf8' cases, to stay bug-compatible,
the plan is, however, to employ the QTextCodecs we have already
in the channel buffers. That will be one-by-one, though.

Change-Id: Id209e0671920d4ea4197918e872f441254112d52
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/qtsupport/qtversionmanager.cpp

@@ -375,7 +375,7 @@ static QList<QByteArray> runQtChooser(const QString &qtchooser, const QStringLis
     p.start();
     p.waitForFinished();
     const bool success = p.exitCode() == 0;
-    return success ? p.readAllStandardOutput().split('\n') : QList<QByteArray>();
+    return success ? p.readAllRawStandardOutput().split('\n') : QList<QByteArray>();
 }
 
 // Asks qtchooser for the qmake path of a given version