Don't fail the install if marking a user on macOS is killed #2555

Job	Run time
Lints	2m 31s
build-aarch64-darwin / Build aarch64 Darwin	7m 56s
build-aarch64-linux / Build aarch64 Linux (static)	10m 0s
build-x86_64-darwin / Build x86_64 Darwin	11m 26s
build-x86_64-linux / Build x86_64 Linux (static)	6m 53s
Run aarch64 Darwin (--determinate)	2m 6s
Run aarch64 Darwin	2m 9s
Run x86_64 Linux (No init, --determinate)	1m 46s
Run x86_64 Linux (--determinate)	1m 47s
Run x86_64 Linux (No init)	1m 29s
Run x86_64 Linux release checks	0s
Run x86_64 Linux	1m 50s
Run aarch64 Linux (--determinate)	1m 34s
Run aarch64 Linux	1m 17s
Run x86_64 Darwin (--determinate)	3m 29s
Run x86_64 Darwin	3m 20s
	59m 33s

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