Incorrect function pointer mapping in case of remapping

[dovdiienko-el3]

In case if I remap the function pointer type, ClangSharpPInvokeGenerator uses remapped typename instead of IntPtr at the place where function pointer type is used within the C code. As result I get following warning:

warning CS8500: This takes the address of, gets the size of, or declares a pointer to a managed type

Steps to reproduce

// api.h
typedef void (ApiPFoo)(int);

struct ApiCallbacks
{
  ApiPFoo* Foo;
};

// pinvoke-header.txt
using ClangSharp.Interop;

# pinvoke.rsp
--file
api.h
--output
PInvoke.cs
--namespace
PInvoke
--language
c
--methodClassName
Native
--prefixStrip
api_
--libraryPath
api.dll
--config
compatible-codegen
--headerFile
pinvoke-header.txt
--remap
ApiCallbacks=Callbacks
ApiPFoo=PFoo

rem generate.cmd
ClangSharpPInvokeGenerator @pinvoke.rsp

Expected

using ClangSharp.Interop;
using System;
using System.Runtime.InteropServices;

namespace PInvoke
{
    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    public delegate void PFoo(int param0);

    public partial struct Callbacks
    {
        [NativeTypeName("ApiPFoo *")]
        public IntPtr Foo;
    }
}

Actual generated file

using ClangSharp.Interop;
using System.Runtime.InteropServices;

namespace PInvoke
{
    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    public delegate void PFoo(int param0);

    public unsafe partial struct Callbacks
    {
        [NativeTypeName("ApiPFoo *")]
        public PFoo* Foo;
    }
}

[tannergooding]

Will take a look. It's probably a bad interplay between the function pointer support that exists for .NET 5+ and the compatible handling that exists for .NET Standard