fix: use counter instead of gauge for metrics that only increase over time

[chaitanyaprem]

Description

Noticed that gauge is being used for metrics that increase over time like number of msgs received/pushed etc.
Aligning them as per definitions https://prometheus.io/docs/concepts/metric_types/

[github-actions]

You can find the image built from this PR at

quay.io/wakuorg/nwaku-pr:3355

Built from 7c17b77

[gabrielmer]

Thanks so much!

[NagyZoltanPeter]

Will the grafana panels work without change upon this?

[chaitanyaprem]

Will the grafana panels work without change upon this?

unless they are using some special property assuming gauge they should work the same.
Because i had a time-series panel which was using gauge and had no impact when changed to Counter.
Any specific issue do you forsee?

[chaitanyaprem]

I am not able to understand why lint is failing.
is there something i need to run locally to figure out what is the issue?

[NagyZoltanPeter]

Will the grafana panels work without change upon this?

unless they are using some special property assuming gauge they should work the same. Because i had a time-series panel which was using gauge and had no impact when changed to Counter. Any specific issue do you forsee?

I think counters in prometheus will be postfixed by _total all those gauge names must be changed in the boards to refer them as <metric_name>_total.
But correct me if I'm wrong.