cv_hal_minMaxIdx has no channel count argument

[mplatings]

System Information

OpenCV version: 4.9.0

Detailed description

cv_hal_minMaxIdx is called in minmax.cpp regardless of the number of channels in the image. cv_hal_minMaxIdx does not take an argument for the number of channels. Therefore it is impossible to implement it correctly.

In KleidiCV we would like to implement cv_hal_minMaxIdx correctly.

Steps to reproduce

See https://gitlab.arm.com/kleidi/kleidicv/-/issues/2

Issue submission checklist

• [X] I report the issue, it's not a question
• [X] I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
• [X] I updated to the latest OpenCV version and the issue is still there
• [ ] There is reproducer code and related data files (videos, images, onnx, etc)