[Py OV] Fix openvino.Model documentation (#29789)

### Details:
 - Port of #29785

### Tickets:
 - [CVS-164395](https://jira.devtools.intel.com/browse/CVS-164395)

---------

Signed-off-by: Alicja Miloszewska <alicja.miloszewska@intel.com>
Co-authored-by: Mikhail Ryzhov <mikhail.ryzhov@intel.com>

Author: almilosz

src/bindings/python/src/openvino/_ov_api.py

@@ -28,6 +28,16 @@ class ModelMeta(type):
     def __dir__(cls) -> list:
         return list(set(cls.__dict__.keys()) | set(dir(ModelBase)))
 
+    def __getattribute__(cls, name: str) -> Any:
+        if name == "__init__":
+            return getattr(ModelBase, name)
+        return super().__getattribute__(name)
+
+    def __getattr__(cls, name: str) -> Any:
+        # Return the attribute defined in _pyopenvino.Model if it exists
+        # otherwise AttributeError will be raised
+        return getattr(ModelBase, name)
+
 
 class Model(object, metaclass=ModelMeta):
     def __init__(self, *args: Any, **kwargs: Any) -> None: