QMetaTypeModuleHelper: suppress cppcoreguidelines-virtual-class-destructor

Says clang-tidy:

   destructor of '(unnamed struct at qmetatype.cpp:966:14)' is public and non-virtual
   in file:src/corelib/kernel/qmetatype.cpp line:966 col:14

       static const struct : QMetaTypeModuleHelper

Yes, these classes are polymorphic (because the base class is). Yes,
the destructor is non-virtual (because the base class' one isn't, but
it's also protected, so fine).

But these classes are not used as base classes, so suppress the
warning.

Pick-to: 6.6 6.5 6.2
Change-Id: I75be86bca36a4a0e93d72acb1a0d2fe0dca1c505
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit 11d153ae1ce3ce75e76a1fcac7bf99e4cff05716)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/corelib/kernel/qmetatype.cpp

@@ -954,6 +954,7 @@ static const struct { const char * typeName; int typeNameLength; int type; } typ
     {nullptr, 0, QMetaType::UnknownType}
 };
 
+// NOLINTNEXTLINE(cppcoreguidelines-virtual-class-destructor): this is not a base class
 static const struct : QMetaTypeModuleHelper
 {
     template<typename T, typename LiteralWrapper =

src/gui/kernel/qguivariant.cpp

@@ -56,6 +56,7 @@ QT_BEGIN_NAMESPACE
 
 namespace {
 
+// NOLINTNEXTLINE(cppcoreguidelines-virtual-class-destructor): this is not a base class
 static const struct : QMetaTypeModuleHelper
 {
 #define QT_IMPL_METATYPEINTERFACE_GUI_TYPES(MetaTypeName, MetaTypeId, RealName) \

src/widgets/kernel/qwidgetsvariant.cpp

@@ -12,6 +12,7 @@ QT_BEGIN_NAMESPACE
 
 namespace {
 
+// NOLINTNEXTLINE(cppcoreguidelines-virtual-class-destructor): this is not a base class
 static const struct : QMetaTypeModuleHelper
 {
     const QtPrivate::QMetaTypeInterface *interfaceForType(int type) const override {