ci: reduce jobs to 3 on macos runners #642

Job	Run time
linux-glibc-debian-bookworm-gcc	5m 14s
linux-glibc-debian-bookworm-llvm	5m 37s
linux-glibc-debian-sid-llvm-riscv64	3m 20s
linux-glibc-debian-sid-gcc-riscv64	3m 39s
linux-glibc-debian-testing-llvm	5m 25s
linux-glibc-debian-testing-gcc	5m 49s
linux-musl-alpine-gcc	3m 17s
linux-musl-alpine-llvm	2m 58s
linux-musl-debian-bookworm-gcc	5m 12s
linux-musl-debian-bookworm-llvm	5m 0s
linux-musl-debian-sid-gcc-riscv64	3m 18s
linux-musl-debian-testing-gcc	1m 42s
linux-musl-debian-sid-llvm-riscv64	3m 19s
linux-musl-debian-testing-llvm	5m 11s
linux-musl-from-mac	40s
mac-llvm	4m 21s
mac-clang	4m 8s
reuse-check	9s
shellcheck	7s
spellcheck	6s
win-gcc	6m 15s
win-llvm	8m 19s
win-llvm-from-mac	1s
	1h 23m 7s

Provide feedback