qa/workunits: fix some details on telemetry workunits

qa/workunits: fix some details on telemetry workunits

1. For the telemetry upgrade tests, we want to
   make sure we enable the perf channel before we
   upgrade to test that out.

2. We also want to be sure to set up ident information.
   in the workunits used before the upgrade.

3. We can remove the "opt out" commands in the before-upgrade
   workunits since we want to stay opted in during the upgrade.
   We only opt out after all the checks are complete.

4. We mistakenly test "ceph telemetry show" twice when one
   of then should be "ceph telemetry show-all".

Signed-off-by: Laura Flores <lflores@ibm.com>