metrics: remove VictoriaMetrics/metrics lib (#8766)

# Background

Erigon currently uses a combination of Victoria Metrics and Prometheus
client for providing metrics.

We want to rationalize this and use only the Prometheus client library,
but we want to maintain the simplified Victoria Metrics methods for
constructing metrics.

This task is currently partly complete and needs to be finished to a
stage where we can remove the Victoria Metrics module from the Erigon
code base.

# Summary of changes

- Remove `UsePrometheusClient` boolean flag
- Remove `VictoriaMetrics` client lib and related code (simplifies
registry and prometheus http handler initialisation since now we have
only 1 registry and can use default `promhttp.Handler`)

erigon-lib/go.mod

@@ -12,7 +12,6 @@ require (
 
 require (
 	github.com/RoaringBitmap/roaring v1.2.3
-	github.com/VictoriaMetrics/metrics v1.23.1
 	github.com/anacrolix/dht/v2 v2.20.0
 	github.com/anacrolix/go-libutp v1.3.1
 	github.com/anacrolix/log v0.14.3-0.20230823030427-4b296d71a6b4
@@ -37,7 +36,6 @@ require (
 	github.com/pelletier/go-toml/v2 v2.1.0
 	github.com/prometheus/client_golang v1.17.0
 	github.com/prometheus/client_model v0.5.0
-	github.com/prometheus/common v0.44.0
 	github.com/quasilyte/go-ruleguard/dsl v0.3.22
 	github.com/spaolacci/murmur3 v1.1.0
 	github.com/stretchr/testify v1.8.4
@@ -129,12 +127,11 @@ require (
 	github.com/pion/webrtc/v3 v3.1.42 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/common v0.44.0 // indirect
 	github.com/prometheus/procfs v0.11.1 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/rs/dnscache v0.0.0-20211102005908-e0241e321417 // indirect
 	github.com/sirupsen/logrus v1.9.0 // indirect
-	github.com/valyala/fastrand v1.1.0 // indirect
-	github.com/valyala/histogram v1.2.0 // indirect
 	go.etcd.io/bbolt v1.3.6 // indirect
 	go.opentelemetry.io/otel v1.8.0 // indirect
 	go.opentelemetry.io/otel/trace v1.8.0 // indirect
@@ -151,5 +148,3 @@ require (
 	rsc.io/tmplfunc v0.0.3 // indirect
 	zombiezen.com/go/sqlite v0.13.1 // indirect
 )
-
-replace github.com/VictoriaMetrics/metrics => github.com/ledgerwatch/victoria-metrics v0.0.7

erigon-lib/go.sum

@@ -299,8 +299,6 @@ github.com/ledgerwatch/log/v3 v3.9.0 h1:iDwrXe0PVwBC68Dd94YSsHbMgQ3ufsgjzXtFNFVZ
 github.com/ledgerwatch/log/v3 v3.9.0/go.mod h1:EiAY6upmI/6LkNhOVxb4eVsmsP11HZCnZ3PlJMjYiqE=
 github.com/ledgerwatch/secp256k1 v1.0.0 h1:Usvz87YoTG0uePIV8woOof5cQnLXGYa162rFf3YnwaQ=
 github.com/ledgerwatch/secp256k1 v1.0.0/go.mod h1:SPmqJFciiF/Q0mPt2jVs2dTr/1TZBTIA+kPMmKgBAak=
-github.com/ledgerwatch/victoria-metrics v0.0.7 h1:jW7v1oQ64HcR3rhPfC9vLQhyRHAkKE9tFNOer6gDHvg=
-github.com/ledgerwatch/victoria-metrics v0.0.7/go.mod h1:QVs9/9u6IewQcgSwsmzW+fQqqpid5XvN//X6gt9h504=
 github.com/matryer/moq v0.3.3 h1:pScMH9VyrdT4S93yiLpVyU8rCDqGQr24uOyBxmktG5Q=
 github.com/matryer/moq v0.3.3/go.mod h1:RJ75ZZZD71hejp39j4crZLsEDszGk6iH4v4YsWFKH4s=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
@@ -462,10 +460,6 @@ github.com/tidwall/btree v1.6.0/go.mod h1:twD9XRA5jj9VUQGELzDO4HPQTNJsoWWfYEL+EU
 github.com/tinylib/msgp v1.0.2/go.mod h1:+d+yLhGm8mzTaHzB+wgMYrodPfmZrzkirds8fDWklFE=
 github.com/tinylib/msgp v1.1.0/go.mod h1:+d+yLhGm8mzTaHzB+wgMYrodPfmZrzkirds8fDWklFE=
 github.com/tinylib/msgp v1.1.2/go.mod h1:+d+yLhGm8mzTaHzB+wgMYrodPfmZrzkirds8fDWklFE=
-github.com/valyala/fastrand v1.1.0 h1:f+5HkLW4rsgzdNoleUOB69hyT9IlD2ZQh9GyDMfb5G8=
-github.com/valyala/fastrand v1.1.0/go.mod h1:HWqCzkrkg6QXT8V2EXWvXCoow7vLwOFN002oeRzjapQ=
-github.com/valyala/histogram v1.2.0 h1:wyYGAZZt3CpwUiIb9AU/Zbllg1llXyrtApRS815OLoQ=
-github.com/valyala/histogram v1.2.0/go.mod h1:Hb4kBwb4UxsaNbbbh+RRz8ZR6pdodR57tzWUS3BUzXY=
 github.com/willf/bitset v1.1.9/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
 github.com/willf/bitset v1.1.10/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=