native interface plumbing: Fix ambiguities with existing classes named TypeInfo

As is the case in Qt for Python, causing:

QtCore/qcoreapplication.h: In member function I* QCoreApplication::nativeInterface() const:
QtCore/qcoreapplication.h:163:5: error: reference to TypeInfo is ambiguous
  163 |     QT_DECLARE_NATIVE_INTERFACE_ACCESSOR

Amends 7feeb7c34b.

Change-Id: I7d363e1d8c0a0f648d12f8040afb9d071356cbb8
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

src/corelib/global/qnativeinterface.h

@@ -104,11 +104,10 @@ namespace QNativeInterface::Private {
     I *nativeInterface() const \
     { \
         using T = std::decay_t<decltype(*this)>; \
-        using namespace QNativeInterface::Private; \
-        static_assert(TypeInfo<I>::template isCompatibleWith<T>, \
+        static_assert(QNativeInterface::Private::TypeInfo<I>::template isCompatibleWith<T>, \
             "T::nativeInterface<I>() requires that native interface I is compatible with T"); \
         \
-        return static_cast<I*>(resolveInterface(this, typeid(I), TypeInfo<I>::revision())); \
+        return static_cast<I*>(QNativeInterface::Private::resolveInterface(this, typeid(I), QNativeInterface::Private::TypeInfo<I>::revision())); \
     }
 
 // Provides a definition for the interface destructor