Refactor #4399

Job	Run time
build-macos	4m 57s
build-distros (alpine)	17m 59s
build-distros (archlinux)	18m 39s
build-freebsd	15m 54s
build-distros (debian:11)	12m 15s
build-msys	12m 16s
build-distros (fedora)	13m 15s
build-multi-archs	20m 10s
build-distros (gentoo/stage3)	21m 15s
build-sanitizers	11m 8s
build-distros (opensuse/tumbleweed)	13m 35s
build-sanitizers (-DMOLD_USE_ASAN=On)	15m 33s
build-windows	24m 22s
build-distros (ubuntu:22.04)	11m 34s
build-sanitizers (-DMOLD_USE_TSAN=On)	25m 2s
	3h 57m 54s

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