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/cmakeprojectmanager/cmakebuildstep.cpp

@@ -628,7 +628,7 @@ void CMakeBuildStep::recreateBuildTargetsModel()
             m_buildTargets.push_back(m_allTarget);
     }
 
-    for (const QString &buildTarget : qAsConst(targetList))
+    for (const QString &buildTarget : std::as_const(targetList))
         addItem(buildTarget, specialTargets(usesAllCapsTargets).contains(buildTarget));
 
     updateBuildTargetsModel();