.github: workflows: Upgrade actions to Node.js 24 runtimes

[joaoantoniocardoso]

Summary

• Bump workflow JS actions to majors that declare runs.using: node24, clearing the “Node.js 20 is deprecated” job annotation on CI.
• rust.yml: actions/checkout@v5, actions/setup-node@v5 (the actions named in the current warning).
• deploy.yml: same plus upload-artifact@v6, download-artifact@v7, geekyeggo/delete-artifact@v6, skymatic/semver-validation-action@v4.

Already on Node 24 (unchanged): Swatinem/rust-cache@v2, svenstaro/upload-release-action@v2, dtolnay/rust-toolchain@stable.

Note: BlueOS-community/Deploy-BlueOS-Extension@main and bluerobotics/blueos-cloud-action@0.0.3 are composites that still pin some Node 20 actions internally (checkout@v4, cache@v4, upload-artifact@v4, older docker/*). Those may still warn on the deploy job until those repos are updated upstream.

Test plan

• Confirm Build, Check, and Test passes and the job annotation no longer lists checkout@v4 / setup-node@v4.
• Confirm deploy workflow artifact upload/download/delete still works across the matrix.
• Spot-check that semver gate still runs with skymatic/semver-validation-action@v4.