FlashArray dashboards use non-existent metric for average throughput

[knack-roque]

The average throughput panels on the dashboards show N/A because they're calculated on a non-existent metric of purefa_array_performance_throughput_bytes. If it's supposed to be similar to the average volume throughput panels then I'd expect the query to be sum (purefa_array_performance_bandwidth_bytes{job=~"$job", instance="$instance", volume="$volume"} ) or the metric name needs to change.

For now in my local copy I'm just going to change the dashboard to use the metric that exists since that's less effort for me.

[sdodsley]

pure-exporter deprecated as noted in README