CallerMemberNameAttribute on parameter of attribute constructor referenced by a local function or its type parameter

(I'll reformat this to match the issue template next weekend, if not sooner.)

```csharp
using System;
using System.Runtime.CompilerServices;

public class MAttribute : Attribute {
public MAttribute(
[CallerMemberName]string? name = null) {
}
}

class C {
void Fun1() {
void Fun2<[M]T>(){}
}
}
```

SharpLab shows this being lowered to `void Fun2<[M("Fun2")]T>(){}` but the draft seems to require `void Fun2<[M("Fun1")]T>(){}` because Fun2 as a local function is not a function member. Now is that a compiler bug or a spec bug?

_Originally posted by @KalleOlaviNiemitalo in https://github.com/dotnet/csharpstandard/pull/1548#issuecomment-3794804052_