Added option to skip linking against `libunwind` #975

Job	Run time
lint	17s
abs_paths_test (true)	2m 15s
container_test (archlinux, true)	2m 28s
abs_paths_test (false)	2m 6s
external_test (macos-13, latest, true)	15m 19s
container_test (archlinux, false)	2m 29s
sys_paths_test (true)	3m 18s
external_test (macos-13, latest, false)	14m 7s
container_test (debian, true)	2m 41s
sys_paths_test (false)	3m 47s
test (macos-latest, 7.0.0, true)	2m 35s
external_test (ubuntu-latest, latest, true)	7m 45s
container_test (debian, false)	2m 39s
test (macos-latest, 7.0.0, false)	2m 33s
external_test (ubuntu-latest, latest, false)	7m 52s
container_test (fedora, true)	2m 38s
test (macos-latest, latest, true)	2m 12s
xcompile_test (true)	2m 24s
container_test (fedora, false)	2m 38s
xcompile_test (false)	2m 10s
test (macos-latest, latest, false)	2m 25s
container_test (suse_leap, true)	3m 7s
test (ubuntu-latest, 7.0.0, true)	2m 21s
container_test (suse_leap, false)	2m 49s
test (ubuntu-latest, 7.0.0, false)	2m 20s
container_test (suse_tumbleweed, true)	2m 39s
test (ubuntu-latest, latest, true)	2m 27s
test (ubuntu-latest, latest, false)	2m 19s
container_test (suse_tumbleweed, false)	2m 37s
container_test (ubuntu_20_04, true)	2m 36s
container_test (ubuntu_20_04, false)	2m 45s
container_test (ubuntu_22_04, true)	2m 38s
container_test (ubuntu_22_04, false)	2m 33s
container_test (linux_sysroot, true)	2m 35s
container_test (linux_sysroot, false)	2m 31s
	2h 2m 55s

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