NSOrderedCollectionDifference binding in Xcode 13 has issue with generic MonoPInvokeCallback and generator

[chamons]

As part of Xcode 13's Foundation changes (originally in #13328 but later in Xcode 14) this callback is needed:

		internal delegate NSOrderedCollectionDifference<NSObject>? NSOrderedCollectionDifferenceGetDifferenceHandlerProxy (IntPtr blockLiteral, /* NSOrderedCollectionChange */ IntPtr change);
		static readonly NSOrderedCollectionDifferenceGetDifferenceHandlerProxy static_ChangeAllback = GetDiffHandler;

		[MonoPInvokeCallback (typeof (NSOrderedCollectionDifferenceGetDifferenceHandlerProxy))]
		static NSOrderedCollectionDifference<NSObject>? GetDiffHandler (IntPtr block, IntPtr change)

However, both generator.cs and the cecil test MonoPInvokeCallback do not like the generic <NSObject> portion.

I removed it, and then the generator, cecil test, and Manuel's monotouch tests all pass however, we are not certain that is correct.

The base collection has:

    public sealed partial class NSOrderedCollectionDifference<TKey> : NSOrderedCollectionDifference
        where TKey : class, INativeObject {

So it can in theory have INativeObjects that are not NSObjects.

Manuel and I were not confident, so we are disabling those bindings with this issue tracking.