#21631 Add MNN matrix export tests to --slow CI

Merged

Ghost merged 1 commits into Ultralytics:main from ultralytics:mnn-matrix-tests

View left	View right
..
Dockerfile	Dockerfile
Dockerfile-arm64	Dockerfile-arm64
Dockerfile-conda	Dockerfile-conda
Dockerfile-cpu	Dockerfile-cpu
Dockerfile-jetson-jetpack4	Dockerfile-jetson-jetpack4
Dockerfile-jetson-jetpack5	Dockerfile-jetson-jetpack5
Dockerfile-jetson-jetpack6	Dockerfile-jetson-jetpack6
Dockerfile-jupyter	Dockerfile-jupyter
Dockerfile-python	Dockerfile-python
Dockerfile-runner	Dockerfile-runner