Use ghcup-setup in CI #135

Job	Run time
redhat-ubi9	4m 30s
build (ubuntu-24.04, 9.12)	3m 38s
build (ubuntu-24.04, 9.10)	1m 55s
arm (arm32v7)	1s
build (ubuntu-24.04, 9.8)	2m 6s
arm (arm64v8)	1s
fedora37	4m 40s
build (ubuntu-24.04, 9.6)	3m 8s
build (ubuntu-24.04, 9.4)	3m 1s
build (ubuntu-24.04, 9.2)	2m 22s
i386	2m 3s
build (ubuntu-24.04, 9.0)	4m 39s
freebsd (self-hosted, FreeBSD, X64, 9.4)	1s
build (ubuntu-24.04, 8.10)	4m 44s
freebsd (self-hosted, FreeBSD, X64, 9.6)	1s
build (ubuntu-24.04, 8.8)	4m 33s
build (ubuntu-24.04, 8.6)	4m 19s
build (macOS-latest, 9.12)	5m 16s
build (macOS-latest, 9.10)	4m 17s
build (macOS-latest, 9.8)	3m 53s
build (macOS-latest, 9.6)	3m 52s
build (macOS-latest, 9.4)	3m 47s
build (macOS-latest, 9.2)	3m 1s
	1h 9m 48s

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