Its working. See https://github.com/stan-dev/math/actions/runs/110718316
At the moment its split in 4 jobs, though we could easily make it two:
- fwd, mix
- the rest
If we decide to only run this on merges to develop, we could also only have 1 job that runs for ~4 hours. Since its not a bottleneck there is not really a huge difference how long it takes.