System Information

Platform: any

Detailed description

Yolo NAS uses Concat with negative axis. Current implementation of ONNXImporter::parseConcat does not handle it.

Steps to reproduce

Reproducer: #24809
Also "conformance" test "test_concat_1d_axis_negative_1" may highlight it, but it's disabled.

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
• 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)