`-Wshadow-field` reported instead of `-Wshadow-field-in-constructor` with fields from base class

```cpp
class Base
{
protected:
Base(bool b) : b(b) {}
bool b;
};

class Derived : public Base
{
public:
Derived(bool b) : Base(b) {}
};
```

```
:4:15: warning: constructor parameter 'b' shadows the field 'b' of 'Base' [-Wshadow-field-in-constructor]
4 | Base(bool b) : b(b) {}
| ^
:5:10: note: previous declaration is here
5 | bool b;
| ^
:11:18: warning: parameter 'b' shadows member inherited from type 'Base' [-Wshadow-field]
11 | Derived(bool b) : Base(b) {}
| ^
:5:10: note: declared here
5 | bool b;
| ^
``

https://godbolt.org/z/aKbqxGdE9

I would have expected `-Wshadow-field-in-constructor` in both cases.

Start with the provided C++ reproducer in the linked Godbolt example and compare the diagnostics for the base and derived constructors. Trace Clang's shadow-warning handling to determine why the inherited-field case uses -Wshadow-field; done means both constructor parameters receive the expected -Wshadow-field-in-constructor diagnostic.

Written by the indexing model from the issue text.