GitLab

Fix CI deprecation warnings

- Upgrade actions/checkout to v3 and actions/cache to v3.3.2 to address node.js 12 warnings
- https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/
- Replace usages of set-output with `>> $GITHUB_OUTPUT` for Unix and `>> %GITHUB_OUTPUT` for Windows