Uses https://github.com/nschloe/action-cached-lfs-checkout where we're using git-lfs.
This is a wrapper around `actions/checkout@v3` which uses `actions/cache@v3` to cache the files on LFS to avoid downloading them every time and spare LFS bandwidth.
Move the dependency check job from the quality workflow that
runs on every PR to the nightly reports workflow. This sometimes
flakes as it does a _lot_ of HTTP requests. It's less intrusive
if that happens outside of the PR workflow.
Also change the nightly job that runs tests to use LFS, so it
actually has access to screenshots :)
The sonar task is still broken, but it seems like an upstream bug:
https://community.sonarsource.com/t/sonar-plugin-4-1-0-3113-4-2-0-3129-errors/91568
