Refactor #4356

Job	Run time
build-msys	11m 47s
build-macos	4m 46s
build-distros (alpine)	17m 20s
build-distros (archlinux)	18m 37s
build-multi-archs	20m 2s
build-sanitizers	10m 49s
build-windows	24m 19s
build-sanitizers (-DMOLD_USE_ASAN=On)	14m 5s
build-distros (debian:11)	12m 5s
build-distros (fedora)	12m 47s
build-sanitizers (-DMOLD_USE_TSAN=On)	24m 45s
build-freebsd	15m 53s
build-distros (gentoo/stage3)	20m 52s
build-distros (opensuse/tumbleweed)	13m 17s
build-distros (ubuntu:22.04)	11m 48s
	3h 53m 12s

Provide feedback