mgr/dashboard: dashboard-v3: cluster-utilization card

mgr/dashboard: dashboard-v3: cluster-utilization card

mgr/dashboard: some improvements

mgr/dashboard: updated promqls and improved tooltips

mgr/dashboard: some fixes and improvements

mgr/dashboard: added square box plugin and improved/fixed code

mgr/dashboard: added maxValue option for graphs and added tooltips to text

mgr/dashboard: removed unnecessary variables

mgr/dashboard: fix openapi

tracker: https://tracker.ceph.com/issues/57863
Signed-off-by: Pedro Gonzalez Gomez <pegonzal@redhat.com>