Add ability to set device class for existing osd deployments,
based on its crush map device class.
Related-Issue: rook#8028
Signed-off-by: Denis Egorenko <degorenko@mirantis.com>
Update OSDs in parallel per the design in
design/ceph/update-osds-in-parallel.md
The max number of OSDs updated in parallel is currently fixed at 20.
Signed-off-by: Blaine Gardner <blaine.gardner@redhat.com>