* gnu/packages/patches/slurm-23-salloc-fallback-shell.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/parallel.scm (slurm): Use it.
(slurm-22.05, slurm-21.08, slurm-20.11, slurm-20.02)
(slurm-19.05, slurm-18.08): Drop it.
Change-Id: I1498e8d21d631c988edf75a8bcc8d2ae5f244b7a