Github OSx runner cannot run tests anymore

[StRigaud]

It seems that the OSx runner from the Github CI now fail to run OpenCL operations.
See:

• update cmake configuration #289
• fix the return type of multiply_image_and_position() #288

The runner was used for running tests and coverage as it was easier due to the pre-availability of the OpenCL framework on the OS as well as the presence of a device capable of running code.

The output error is that CLIc is no more capable of finding an OpenCL device on the runner...

[kevinyamauchi]

This could be because Github Actions switched to using ARM on macos-latest. You might try to switch to macos-13 switch back to Intel.

[StRigaud]

Indeed, tested with #289 and it works. Thanks @kevinyamauchi !
Would be great to be able to move the tests on Ubuntu-latest but PoCL fail to work as it does not properly identify the AMD CPU used by Github Actions :/