The format that is currently reported by the chain isn't very useful, as
it gives an average for ALL the nodes, and not only the leaves, which
skews the results.
Also, until now there was no way to activate the reporting of errors.
We also decided that metrics weren't the right tool to report this data,
so we decided to dump it to the console if the flag is enabled. A better
system should be built, but for now, printing to the logs does the job.
Switches to using counters so that the gauges don't cause any
information to be lost. Counters can be used to calculate all sorts of
metrics on Grafana. Which is also why min/avg/max logic is removed to
make things simple and small here.
Filtering for leaf nodes was missing from #32388, which means that even
the root done was reported, which made little sense for the bloatnet
data processing we want to do.
