ergon/metrics contains a lot of unused types - the pull is removing them
prior to rationalizing between Prometheus and Victoria Metrics types.
It also have upgrades of golang-lru + sets types to v2 when possible.
This is an update of:
https://github.com/ledgerwatch/erigon/pull/7846
which uses a local fork of victoria metrics to include the changes that
https://github.com/anshalshukla added to the original for we where
using.
It also includes code to address the duplicate metrics issue identified
here:
https://github.com/ledgerwatch/erigon/issues/8053
It has one more associated fix which is to correctly add a metadata
label to counters, these where previously labelled as gauges.
e.g.
```
# TYPE p2p_peers counter
p2p_peers 0
```
rather than
```
# TYPE p2p_peers gauge
p2p_peers 0
```
---------
Co-authored-by: Anshal Shukla <53994948+anshalshukla@users.noreply.github.com>
Co-authored-by: Anshal Shukla <shukla.anshal85@gmail.com>
