Install setuptools on macos workflows

[thegecko]

Macos workflows are currently broken because the hosts no longer have some key tools for some reason.

This PR fixes the build and test macos flows

[thegecko]

Anything needed to chaperone this through?

[boneskull]

I just ran into this. distutils was removed in Python v3.12

[thegecko]

@reconbot can we expedite this?

[thegecko]

bump

[Julusian]

In one place 'macos-11' is used, in another 'macos-latest'.
Does this mean it will break when updating/changing the macos image? Perhaps the check should be done as runner.os == 'macOS' so that it doesn't care what image is used?

[thegecko]

In one place 'macos-11' is used, in another 'macos-latest'.

Yeah, I don't know why this is. I'll try to converge on one and see if it still builds....

[Julusian]

In one place 'macos-11' is used, in another 'macos-latest'.

Yeah, I don't know why this is. I'll try to converge on one and see if it still builds....

Part of why I asked this is because the macos-11 image is deprecated and being phased out https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories so that will need changing to macos-12 or something soon, which will also need updating on this check