Revert typeshed ctypes change

The plugin provides superior type checking:
#13987 (comment)
A manual cherry-pick of e437cdf.

Author: AlexWaygood

mypy/typeshed/stdlib/_ctypes.pyi

@@ -324,12 +324,7 @@ class Array(_CData, Generic[_CT], metaclass=_PyCArrayType):
     @_type_.setter
     def _type_(self, value: type[_CT]) -> None: ...
 
-    # Note: only available if _CT == c_char
-    @property
-    def raw(self) -> bytes: ...
-    @raw.setter
-    def raw(self, value: ReadableBuffer) -> None: ...
-
+    raw: bytes  # Note: only available if _CT == c_char
     value: Any  # Note: bytes if _CT == c_char, str if _CT == c_wchar, unavailable otherwise
     # TODO: These methods cannot be annotated correctly at the moment.
     # All of these "Any"s stand for the array's element type, but it's not possible to use _CT