tests

Remove 'macOS 12' runner #491

Job	Run time
tests (Alpine Edge, ubuntu-latest, alpine-edge)	1m 19s
tests (Alpine Latest, ubuntu-latest, alpine-latest)	1m 9s
tests (Archlinux Base, ubuntu-latest, archlinux)	1m 46s
tests (Centos Stream9, ubuntu-latest, centos-stream9)	1m 32s
tests (Debian Stable, ubuntu-latest, debianstable)	1m 36s
tests (Debian Testing, ubuntu-latest, debiantesting)	1m 28s
tests (Fedora 37, ubuntu-latest, fedora37)	1m 42s
tests (Fedora 38, ubuntu-latest, fedora38)	1m 55s
tests (OpenSUSE Leap, ubuntu-latest, opensuseleap)	2m 29s
tests (OpenSUSE Tumbleweed, ubuntu-latest, opensusetumbleweed)	1m 39s
tests (Ubuntu 18.04, ubuntu-latest, ubuntu1804)	1m 29s
tests (Ubuntu 20.04, ubuntu-latest, ubuntu2004)	2m 9s
tests (Ubuntu 22.04, ubuntu-latest, ubuntu2204)	2m 3s
tests (macOS 13, macos-13, osx-13)	6m 11s
tests (macOS 14, macos-14, osx-14)	2m 49s
	31m 16s

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