Manage tiering strategy to ensure GPFS + Ceph usage does not exceed entitlements

Currently on GPFS5, quotas only affect the GPFS tier, not the Ceph tier. If data is moved from GPFS to Ceph, the GPFS quota remains the same, effectively giving researchers additional total storage, which may exceed their entitlement.

Let's find a strategy to ensure entitlements are not exceeded by combined GPFS + Ceph usage.