Add MacOS on Apple Silicon as a fully supported platform #493

Job	Run time
Fedora 39 bootstrap	40s
Validate Docker image builds	30s
Lint bash, docker, markdown, and yaml	1m 7s
Alpine bootstrap	40s
Verify CHANGELOG is valid	8s
arm64 MacOS tests	1m 15s
Ubuntu 20.04 bootstrap	36s
Ubuntu 22.04 bootstrap	39s
x86-64 Linux tests	1m 32s
x86-64 MacOS tests	1m 59s
x86_64 MacOS bootstrap	1m 11s
x86-64 Windows tests	4m 10s
	14m 27s

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