Port from qAsConst() to std::as_const()

We've been requiring C++17 since Qt 6.0, and our qAsConst use finally
starts to bother us (QTBUG-99313), so time to port away from it
now.

Since qAsConst has exactly the same semantics as std::as_const (down
to rvalue treatment, constexpr'ness and noexcept'ness), there's really
nothing more to it than a global search-and-replace.

Task-number: QTBUG-99313
Change-Id: I88edd91395849574436299b8badda21bb93bea39
Reviewed-by: hjk <hjk@qt.io>

src/plugins/vcsbase/vcsbaseclient.cpp

@@ -572,7 +572,7 @@ void VcsBaseClient::statusParser(const QString &text)
 
     QStringList rawStatusList = text.split(QLatin1Char('\n'));
 
-    for (const QString &string : qAsConst(rawStatusList)) {
+    for (const QString &string : std::as_const(rawStatusList)) {
         const VcsBaseClient::StatusItem lineInfo = parseStatusLine(string);
         if (!lineInfo.flags.isEmpty() && !lineInfo.file.isEmpty())
             lineInfoList.append(lineInfo);