adding a role to mount from ceph
pre-approved by CH see https://gitlab.erc.monash.edu.au/hpc-team/clusterbuild/-/merge_requests/839
Downtime: Monday, March 16, 9:00–11:00 AM — scheduled maintenance.
pre-approved by CH see https://gitlab.erc.monash.edu.au/hpc-team/clusterbuild/-/merge_requests/839