Update LLVM versions in tests #482

Job	Run time
lint	30s
external_test (macos-latest, latest, true)	17m 47s
container_test (archlinux)	3m 29s
external_test (macos-latest, latest, false)	18m 38s
test (macos-latest, 6.0.0, false)	3m 9s
container_test (debian)	4m 15s
abs_paths_test	2m 57s
external_test (ubuntu-latest, latest, true)	16m 16s
test (macos-latest, 6.1.0, true)	2m 46s
container_test (fedora)	4m 10s
test (macos-latest, latest, true)	3m 6s
external_test (ubuntu-latest, latest, false)	11m 31s
container_test (suse_leap)	4m 18s
test (macos-latest, latest, false)	2m 47s
sys_paths_test	4m 23s
container_test (suse_tumbleweed)	4m 29s
test (ubuntu-latest, 6.0.0, false)	3m 9s
container_test (ubuntu_20_04)	3m 24s
xcompile_test	3m 2s
test (ubuntu-latest, 6.1.0, true)	4m 30s
container_test (ubuntu_22_04)	3m 15s
test (ubuntu-latest, latest, true)	3m 50s
container_test (linux_sysroot)	4m 40s
test (ubuntu-latest, latest, false)	3m 5s
	2h 13m 26s

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