counters: Move the hardcoded points to the static historical file
The data loaded by the webapp is a mix of of static file
issued from an old munin and live data from prometheus.
These points can be added to the static file so the graphs
will only depends of the content of json loaded
at history_counters_url
Related to #3232 (closed)
Migrated from D5490 (view on Phabricator)