[ENH] Build chroma-load-start binary and add it to chroma-load container

[jasonvigil]

Description of changes

This will be used to initialize new runs of the verification service, by executing the binary in the image.

Test plan

Verify the built image contains the expected binary:

docker buildx build -f ./rust/load/Dockerfile --build-arg RELEASE_MODE=1 --target load_service -t load-service:local .

docker run --rm --entrypoint ./chroma-load-start load-service:local

[github-actions]

Reviewer Checklist

Please leverage this checklist to ensure your code review is thorough before approving

Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
• Does this change intersect with any items on our roadmap, and if so, is there a plan for fitting them together?

Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)

[eculver]

5/5 ⭐s