- Upgrade `actions/upload-artifact` to `v4` to address deprecation
warnings related to Node.js 16, improving compatibility with GitHub
runners. This resolves the following warning from the runners:
> Node.js 16 actions are deprecated. Please update the following actions
> to use Node.js 20: actions/upload-artifact@v3.
- Centralize the use of the `upload-artifact` action through a new
custom action, improving maintainability and consistency across
workflows.
