Add macOS to the pipeline

[Kludex]

• Related to Add macOS to the pipeline #1170

As mentioned on the PR above:

The path we use to bind to the socket is 127 bytes length. AF_UNIX has only 108 bytes allocated for it, so we keep receiving OSError: AF_UNIX path too long.

Solutions that I've tried:

• Use basetemp, but it doesn't work as expected on Windows.
• Use tmp_path_factory, but still doesn't work on some systems. It passes on the GitHub CI, because the path is short, but locally the name is still long.
• Enable test only for Linux systems (I've used the recommended way of checking the system, given the docs.

I've used the last solution, but if you guys have an alternative, feel free to suggest.

EDIT: The goal of the PR evolved due to discussion. Now it's meant to add the macOS machine to the pipeline.

[euri10]

it seems you forgot to add mac-os to the CI ?

[Kludex]

I didn't add it on purpose, as the test suite doesn't pass locally for macOS yet. There are some other tests that needs to be fixed.

I need to check that again, but on GitHub macOS it passes. Maybe related to the M1 chip... Not sure.

In any case, this PR only solves that specific test for macOS.

[euri10]

I'd rather see a full PR for adding mac-os to the CI even if several things have to change just for the history, seems cleaner to me, what do you think ?

[Kludex]

That makes sense 👍

[euri10]

replaced with #1412