Merge pull request #20209 from dillaman/wip-22033-luminous

luminous: mgr/dashboard: added iSCSI IOPS/throughput metrics

Reviewed-by: Mykola Golub <mgolub@suse.com>

diff --cc src/librbd/ImageCtx.cc
Simple merge

diff --cc src/librbd/ImageCtx.h
Simple merge

diff --cc src/librbd/Operations.cc
Simple merge

diff --cc src/librbd/image/RefreshParentRequest.cc
Simple merge

diff --cc src/librbd/io/ImageRequest.cc
Simple merge