Crash on `auto` references in function return types in templates

[adalisk-emikhaylov]

template <typename T>
struct B
{
    auto &blah() {return *this;}
};

inline B<int> foo() {return {};}

This crashes on IsTypeComplete checks of the return type.

I'm using following options, in case it matters:

var options = driver.Options;
options.GeneratorKind = GeneratorKind.CSharp;
options.CheckSymbols = true;
options.GenerateClassTemplates = true;

driver.ParserOptions.LanguageVersion = CppSharp.Parser.LanguageVersion.CPP23;