jit release checklist

[aryairani]

• [x] #4841
• [x] #4846
• [x] confirm CI test suite exercises relevant FFI bindings
• [ ] pass nimbus integration tests
• [ ] brainstorm some other tests?
• [ ] restore the run.native and compile.native commands to visible
• [ ] Nix derivations
• [x] include libb2 on mac?
• [ ] figure out why bundled libcrypto for mac is passed over in favor of incompatible system lib
• [x] fix startup wrappers to put quotes around ucm, in case startup path has spaces etc
• [x] move unison-src/builtin-tests/thread-killed-typeLink-test.u to concurrency-tests now that JIT supports type links?
• [ ] jit test suite failures detectable in CI
• [ ] look into reducing latency for run.native

[ceedubs]

@aryairani it's not a requirement for release, but I'd also love if you could help me understand what is needed for the jit runtime so I can make it available in the Nix derivation for ucm (maybe as an option?).

[aryairani]

@ceedubs Sure, I added it to the list and we can chat. Maybe taking a look at the updated Dockerfile together would be helpful, I just merged some changes about it there.