add autobuild on delta

[matthiasdiener]

cc @ericjbohm
continuation of #3146

Next steps:

• replace dependency on autobuild repo with a submission script embedded in this PR (maybe in the .github/scripts directory or so) instead of https://github.com/UIUC-PPL/autobuild/blob/master/instead_tests/delta/instead_test.sh
• make it test different combinations (like MPI, UCX, ...)
• make it test e.g. NAMD
• add email notification (maybe via actions/send-email)
• add upload to website (maybe via actions/deploy-pages, see e.g. https://github.com/matthiasdiener/orderedsets/blob/main/.github/workflows/doc.yaml)
• Undo 05a93a9

Other considerations:

• Make sure we are using "cheap" instances on delta: https://docs.ncsa.illinois.edu/systems/delta/en/latest/user_guide/running_jobs.html#partitions

[matthiasdiener]

Current error:

Error: Can't use 'tar -xzf' extract archive file: /u/bohm/ppl/actions-runner/_work/_actions/_temp_51fcd156-2c9c-4aca-9ead-91cfc6365e56/a241a101-e4c6-4d31-97f3-1b18e54df11e.tar.gz. return code: 2.

https://github.com/UIUC-PPL/charm/actions/runs/6077800612/job/16488084244

Maybe some permissions issue @ericjbohm ?

Edit: Works now.

[ericjbohm]

Seems to work now that the /scratch filesystem is back.