Fix clang version detection, update freebsd ci #2704

Job	Run time
coverage ubuntu-20.04 rust nightly	10m 1s
coverage macOS-11 rust nightly	12m 12s
clippy ubuntu-latest	5m 14s
clippy macOS-latest	5m 26s
clippy windows-latest	8m 3s
rustfmt ubuntu-latest	14s
test ubuntu-20.04 rust 1.65.0	6m 52s
test ubuntu-22.04 rust 1.65.0 dist-server	7m 50s
test ubuntu-20.04 rust stable	4m 12s
test ubuntu-20.04 rust beta	4m 56s
test ubuntu-20.04 rust nightly	4m 54s
test ubuntu-22.04 rust stable	5m 18s
test macOS-11 rust stable	5m 16s
test windows-2019 rust 1.65.0	10m 26s
test windows-2019 rust nightly	8m 46s
test windows-2019 rust beta	7m 18s
toml_format	10s
build sccache x86_64-unknown-linux-musl	9m 31s
build sccache-dist x86_64-unknown-linux-musl	5m 56s
build sccache aarch64-unknown-linux-musl	32s
build sccache x86_64-apple-darwin	13m 10s
build sccache aarch64-apple-darwin	13m 55s
build sccache x86_64-pc-windows-msvc	14m 0s
test freebsd-13.2 rust stable (macos-12, 13.2)	17m 7s
release	0s
	3h 1m 19s

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