gpu-fleet.json references DCGM_FI_DEV_POWER_MGMT_LIMIT for its
"TDP vs draw" panel, but the custom DCGM Exporter CSV did not declare
it, so the panel silently rendered "No data" on clusters using that
config. Declare the counter, fix the dashboards table in the
gpu-operator examples README, and add a bats test that cross-checks
every DCGM_FI_* reference in tracked dashboards and recording rules
against the union of the upstream default set (snapshotted under
hack/) and the project's custom CSV.
Signed-off-by: Arsolitt <arsolitt@gmail.com>
