This reverts merge request !1069

I see no additional value of this information. It is clearly stated: You
wand to run a GPU application, you need to submit your job to a GPU
cluster.

- Tighten desc.
- Remove "partitions"

- Remove jobname from job file, since it provides no additional value
  here

- Slurm:
  - filesystem features removed, since they are currently not active
  - Add table with information on node-local storage for all clusters
- Beegfs_global0 removed from workspace setting table
- Rework some links
- Add new page on outdated filesystems in the archive and started moving content to this page