[CPyCppyy] Remove implicit conversion of any ctypes ptr type to void*

The `IsCTypesArrayOrPointer` gives false positives in Python 3.13,
resulting the void pointer converter to take the wrong code path and
crash. See:
wlav/cppyy#272

This code path is used for implicit conversion from other `ctypes`
pointer types to `void*`, which is not strictly required. One can
always do an explicit cast:  `ctypes.cast(my_ptr, ctypes.c_void_p )`.

Given that this a niche feature that broke Python 3.13 support for
functions taking `void*`, which is quite common, it can be argued that
it's better to remove this implicit conversion.

This commit fixes the following tests under Python 3.13:

```
roottest-python-basic-datatype
roottest-python-cpp-cpp
```

This reverts the following commit from upstream:
wlav/CPyCppyy@80a0205

bindings/pyroot/cppyy/CPyCppyy/src/Converters.cxx

@@ -203,24 +203,6 @@ static bool IsPyCArgObject(PyObject* pyobject)
     return Py_TYPE(pyobject) == pycarg_type;
 }
 
-static bool IsCTypesArrayOrPointer(PyObject* pyobject)
-{
-    static PyTypeObject* cstgdict_type = nullptr;
-    if (!cstgdict_type) {
-    // get any pointer type to initialize the extended dictionary type
-        PyTypeObject* ct_int = GetCTypesType(ct_c_int);
-        if (ct_int && ct_int->tp_dict) {
-            cstgdict_type = Py_TYPE(ct_int->tp_dict);
-        }
-    }
-
-    PyTypeObject* pytype = Py_TYPE(pyobject);
-    if (pytype->tp_dict && Py_TYPE(pytype->tp_dict) == cstgdict_type)
-        return true;
-    return false;
-}
-
-
 //- helper to establish life lines -------------------------------------------
 static inline bool SetLifeLine(PyObject* holder, PyObject* target, intptr_t ref)
 {
@@ -1506,16 +1488,6 @@ bool CPyCppyy::VoidArrayConverter::SetArg(
         return true;
     }
 
-// allow any other ctypes pointer type
-    if (IsCTypesArrayOrPointer(pyobject)) {
-        void** payload = (void**)((CPyCppyy_tagCDataObject*)pyobject)->b_ptr;
-        if (payload) {
-            para.fValue.fVoidp = *payload;
-            para.fTypeCode = 'p';
-            return true;
-        }
-    }
-
 // final try: attempt to get buffer
     Py_ssize_t buflen = Utility::GetBuffer(pyobject, '*', 1, para.fValue.fVoidp, false);
 
@@ -1628,11 +1600,6 @@ bool CPyCppyy::name##ArrayConverter::SetArg(                                 \
             para.fValue.fVoidp = (void*)((CPyCppyy_tagCDataObject*)pyobject)->b_ptr;\
             para.fTypeCode = 'p';                                            \
             convOk = true;                                                   \
-        } else if (Py_TYPE(pyobject) == GetCTypesType(ct_c_void_p)) {        \
-        /* special case: pass address of c_void_p buffer to return the address */\
-            para.fValue.fVoidp = (void*)((CPyCppyy_tagCDataObject*)pyobject)->b_ptr;\
-            para.fTypeCode = 'p';                                            \
-            convOk = true;                                                   \
         } else if (LowLevelView_Check(pyobject) &&                           \
                 ((LowLevelView*)pyobject)->fBufInfo.ndim == 2 &&             \
                 strchr(((LowLevelView*)pyobject)->fBufInfo.format, code)) {  \