ci: build multi-platform Rust binaries in the deploy job

[tinder-maxwellelliott]

Summary

• Extend the CI deploy job into a Linux/macOS/Windows matrix that builds and uploads the same host-native Rust CLI assets used by GitHub Releases
• Keep JAR + release.tar.gz artifacts on Ubuntu only

Test plan

• Confirm the deploy matrix runs on ubuntu/macOS/windows
• Verify workflow artifacts include:
  • bazel-diff_deploy.jar
  • release.tar.gz
  • bazel-diff-rust-linux-amd64
  • bazel-diff-rust-macos-arm64
  • bazel-diff-rust-windows-amd64.exe
• Spot-check downloaded binaries run --help on their platforms

Made with Cursor

[csmoe]

The release build of rust should add config like:

[profile.release]
codegen-units = 1
lto = fat

Should improve the perf more(maybe not, but they're common release parameters in rust commmunity)