A GitHub action to install OpenVINO from a package repository. This is only necessary for wasi-nn support but there are enough steps here to package the functionality separately and avoid cluttering the CI.

Future improvements:

make this installer work for different OS/distributions (e.g. https://docs.openvinotoolkit.org/latest/openvino_docs_install_guides_installing_openvino_windows.html)
it would be nice to output the install directory (i.e. /opt/intel/openvino)