mgr/dashboard: Add short descriptions to the telemetry report preview

mgr/dashboard: Add short descriptions to the telemetry report preview

A small info icon with a popover on the telemetry report preview form step2 for
Report ID and Report Preview.

Report ID: "A randomized UUID to identify a particular cluster over the course of several telemetry reports."
Report preview: "The actual telemetry data that will be submitted."

Fixes: https://tracker.ceph.com/issues/47610
Signed-off-by: Nizamudeen A <nia@redhat.com>
(cherry picked from commit 6b71e4aaf2b474694911c3f3c819f989d054ed28)

Conflicts:
	    src/pybind/mgr/dashboard/frontend/src/app/ceph/cluster/telemetry/telemetry.component.html
  -  Moved the </label> next to the previous block.