Added option to skip linking against `libunwind` #977

Job	Run time
abs_paths_test (true)	2m 30s
container_test (archlinux, true)	2m 32s
abs_paths_test (false)	2m 30s
external_test (macos-13, latest, true)	15m 50s
container_test (archlinux, false)	2m 23s
external_test (macos-13, latest, false)	10m 54s
container_test (debian, true)	2m 32s
lint	16s
external_test (ubuntu-latest, latest, true)	7m 56s
container_test (debian, false)	2m 34s
external_test (ubuntu-latest, latest, false)	7m 49s
container_test (fedora, true)	2m 41s
sys_paths_test (true)	3m 35s
container_test (fedora, false)	2m 41s
sys_paths_test (false)	3m 20s
test (macos-latest, 7.0.0, true)	2m 18s
container_test (suse_leap, true)	2m 55s
test (macos-latest, 7.0.0, false)	2m 15s
xcompile_test (true)	2m 14s
container_test (suse_leap, false)	2m 54s
test (macos-latest, latest, true)	2m 36s
xcompile_test (false)	1m 58s
container_test (suse_tumbleweed, true)	2m 34s
test (macos-latest, latest, false)	2m 30s
container_test (suse_tumbleweed, false)	2m 51s
test (ubuntu-latest, 7.0.0, true)	2m 20s
container_test (ubuntu_20_04, true)	2m 40s
test (ubuntu-latest, 7.0.0, false)	2m 32s
container_test (ubuntu_20_04, false)	2m 39s
test (ubuntu-latest, latest, true)	2m 22s
container_test (ubuntu_22_04, true)	2m 42s
test (ubuntu-latest, latest, false)	2m 27s
container_test (ubuntu_22_04, false)	2m 33s
container_test (linux_sysroot, true)	2m 32s
container_test (linux_sysroot, false)	2m 30s
	2h 0m 25s

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