onomy_test_lib is the main crate for common test functionality. tests is mainly for local semimanual tests.
update onomyd and onexd versions through the constants in onomy_test_lib/src/dockerfiles.rs.
for faster compilation, add this to ./cargo/config.toml:
[target.x86_64-unknown-linux-gnu]
# follow the instructions on https://github.com/rui314/mold
linker = "clang"
rustflags = ["-C", "link-arg=-fuse-ld=/usr/local/bin/mold"]