No DNN module in 4.6?

### Comment:

I noticed that starting 4.6.x this build misses DNN module, that used to be there.
Was it intentional drop or am I missing something?

```
Python 3.8.15 (default, Nov 24 2022, 09:04:07)
[Clang 14.0.6 ] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> cv2.dnn
Traceback (most recent call last):
File "", line 1, in
AttributeError: module 'cv2' has no attribute 'dnn'
```

```
run:
- python 3.8.*
- py-opencv 4.6.*
- libopencv 4.6.*
```

platform: apple arm64