Added failing test for sorting on an async code-first resolver

[glen-84]

Summary of the changes (Less than 80 chars)

• Added failing test for sorting on an async code-first resolver.

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• The issue is that the matched Resolve overload does not capture the result type.

Relates to #6252.

[glen-84]

I think that this might also be causing this issue:

descriptor
    .Field("bookById")
    .Argument("id", a => a.Type<NonNullType<UuidType>>())
    .Resolve(async ctx => await ctx
        .Service<BookService>()
        .GetBookAsync(ctx.ArgumentValue<Guid>("id")));

1. Unable to infer or resolve the type of field Query.bookById. Try to explicitly provide the type like the following: descriptor.Field("field").Type<List<StringType>>(). (GettingStarted.Types.QueryType)

Using Resolve<Book?> works, but it should probably not be necessary?