returning a None dist_compile_cmd should not report a failed dist com… #219

Job	Run time
check_features (azure)	51s
clippy ubuntu-latest	1m 10s
build sccache x86_64-unknown-linux-musl	6m 17s
clippy macOS-latest	1m 18s
coverage ubuntu-20.04 rust nightly	4m 39s
build sccache-dist x86_64-unknown-linux-musl	3m 3s
coverage macos-13 rust nightly	6m 33s
clippy windows-latest	2m 32s
check_features (gcs)	50s
build sccache aarch64-unknown-linux-musl	6m 22s
rustfmt ubuntu-latest	13s
check_features (gha)	33s
build sccache armv7-unknown-linux-musleabi	6m 6s
check_features (memcached)	41s
build sccache i686-unknown-linux-musl	6m 8s
test ubuntu-20.04 rust 1.75.0	2m 49s
test freebsd-13.2 rust stable (ubuntu-22.04)	9m 30s
build sccache x86_64-apple-darwin	10m 45s
check_features (redis)	51s
test ubuntu-22.04 rust 1.75.0 dist-server	3m 9s
build sccache aarch64-apple-darwin	4m 52s
check_features (s3)	49s
test ubuntu-20.04 rust stable	2m 37s
toml_format	11s
check_features (webdav)	43s
build sccache x86_64-pc-windows-msvc	12m 42s
test ubuntu-20.04 rust beta	2m 43s
test ubuntu-20.04 rust nightly	2m 26s
test ubuntu-20.04 rust stable no-default-features	1m 11s
test ubuntu-22.04 rust stable	2m 44s
test macos-13 rust stable	4m 46s
test macos-14 rust stable	2m 20s
test windows-2019 rust 1.75.0	3m 1s
test windows-2019 rust nightly	3m 0s
test windows-2019 rust beta	3m 19s
release	0s
	2h 1m 44s

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