Support installing Nix on macOS on AWS EC2, without requiring a manua… #2390

Job	Run time
Lints	2m 12s
build-aarch64-darwin / Build aarch64 Darwin	3m 55s
build-aarch64-linux / Build aarch64 Linux (static)	10m 16s
build-x86_64-darwin / Build x86_64 Darwin	10m 47s
build-x86_64-linux / Build x86_64 Linux (static)	3m 22s
Run aarch64 Darwin (--determinate)	2m 21s
Run aarch64 Darwin	2m 26s
Run x86_64 Linux (--determinate)	1m 25s
Run x86_64 Linux (No init, --determinate)	2m 3s
Run x86_64 Linux	1m 20s
Run x86_64 Linux release checks	0s
Run x86_64 Linux (No init)	1m 52s
Run aarch64 Linux (--determinate)	1m 45s
Run aarch64 Linux	1m 20s
Run x86_64 Darwin (--determinate)	5m 8s
Run x86_64 Darwin	5m 5s
	55m 17s

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