dashboard: Add new prometheus alert
dashboard: Add new prometheus alert

It was requested for us to update our alerting definitions to include a
slow OSD Ops health check.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1951664

Signed-off-by: Boris Ranto <e6f2f3d5b819fd5bdcf5d18b7dcb052d2fa0a24f@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible