Allow specialisation of vsg::Inherit for sublasses, alternative implentation

[AnyOldName3]

An alternative to https://github.com/vsg-dev/VulkanSceneGraph/pull/1609

The original PR's description, which is almost entirely relevant to this one, too:

This allows default implementations of members to be provided, prevents copying and pasting of lots of trivial functions, and makes it possible to generate a compiler error if a subclass fails to provide a particular member without making it a pure virtual function.

This is a pretty close equivalent to how in the OSG, there was a META_Object macro that did roughly what the VSG's Inherit template does, but also there were specialised macros like META_Node and META_StateAttribute to do extra things for particular kinds of object.

I've only used this for vsg::ArrayState so far as that was the place where the problem came up in my work (I needed to add extra cloneArrayState overloads and ensure subclasses overrode them). I think it's a fairly safe bet that there are other places where using this would be helpful, as I know I've been annoyed by the lack of such a feature in the past, although I can't remember when or why.

This isn't the prettiest code in the world, ~~and has a bonus extra annoying feature that it makes the Visual Studio debugger add an extra level of indentation to loads of things~~, but it's the best that can be done until P3469 https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2024/p3469r0.pdf is ratified and becomes part of C++ (it's too late to get into C++26) and finally makes CRTP fully obsolete.

Unlike the original PR:

• for classes that don't use this feature, nothing about them changes as all the templates expand to exactly what was used before.
• for classes that do use this feature, there's no need to specify complicated template conditions as that's handled automatically.
• it relies on more basic template features.