app: add p2p stream metric and disable resource manager

[corverroos]

Cherry picks the following PRs from main:

• p2p: add stream counter metric #2278
• app/promauto: implement reset gauge #2289
• app: disable resource manager #2290

category: bug
ticket: #2277

[codecov]

Codecov Report

Patch coverage: 39.68% and project coverage change: -0.01 ⚠️

Comparison is base (496020d) 53.77% compared to head (a57c120) 53.76%.

Additional details and impacted files

@@              Coverage Diff               @@
##           main-v0.16    #2291      +/-   ##
==============================================
- Coverage       53.77%   53.76%   -0.01%     
==============================================
  Files             188      189       +1     
  Lines           25536    25590      +54     
==============================================
+ Hits            13731    13758      +27     
- Misses          10123    10143      +20     
- Partials         1682     1689       +7     

Impacted Files	Coverage Δ
app/app.go	6.93% <0.00%> (-0.04%)	⬇️
app/monitoringapi.go	50.57% <0.00%> (-0.59%)	⬇️
p2p/metrics.go	0.00% <ø> (ø)
p2p/p2p.go	20.52% <0.00%> (-2.02%)	⬇️
app/promauto/resetgauge.go	91.30% <91.30%> (ø)
app/peerinfo/peerinfo.go	70.06% <100.00%> (+0.20%)	⬆️
cmd/relay/p2p.go	38.46% <100.00%> (ø)
core/scheduler/metrics.go	82.35% <100.00%> (+1.10%)	⬆️

... and 10 files with indirect coverage changes

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